It looks like this was an used item as one could tell from the box it was opened before and taped it back again. The box was damaged so is the learning toy. Refer to the pictures for cracked line. The crack is rather deep such that the item is already broken and there's no way one can use it anymore, water will just leak from it!

Recently I decided that I needed a decent but inexpensive balance. This need arose when I decided to correct the micronutrient deficiencies in my lawn. I calculated the small quantities that I needed for the compounds with the needed elements (B, Cu, and Zn), and I ordered them. But I didn't have any way to weigh out the precise quantities that I needed to apply.I hoped that I would find a decent inexpensive balance for maybe less than $50, but I didn’t really have a good sense of what it would cost. I discovered that there are many electronic “scales” for kitchen use. They all require batteries, and I wasn’t fond of the idea of another gadget that needed a battery. And even though the precision of these scales is evident in the number of decimal digits in the display, accuracy is not always equal to precision. I decided that I wanted a balance.I was surprised that I could not find many balances that were intended for real work as opposed to a learning tool for children to play with. The few professional balances that I was able to find were considerably more expensive than what I wanted to spend. When I looked more closely at the balances intended for use as educational tools for children, the Learning Resources Precision School Balance stood out as a balance that would potentially be usable for real work. And the cost made it especially desirable, if in fact it proved to be useful for the kind of real work I needed to do. There were several reasons that it gave me the sense that it might be useful for real work. The cups, which are large and square, rest on self-leveling platforms, without any hangers that would always be in the way. It also looked like it might stand up well to moderately rough handling.When it arrived, I was pleased to discover that it met all of my expectations. It is exactly what I needed, and I was especially happy with the fact that something like this even exists, that can be used for real work and that costs less than $50.On the front of the retail box, it reads, “2000 g capacity with .5 g accuracy”. Even though the heaviest thing I weighed was 50 gram, I have no doubt that it is able to support 2.0 kg as claimed without damage. (2.0 Kg is equivalent to 4.4 lb.) Although, if you add up all the weights that are included, the sum is 106 g (.23 lb). If you want to weigh anything heavier than this, you’ll need to purchase some more calibrated weights.In a pinch, you can use the included weights to measure out exact quantities of water which you can then transfer to zip-lock plastic bags. You can easily make yourself several 50-gram weights. Ideally, you should compensate for the weight of the plastic bag. And if you use a plastic drinking cup to hold the water while you weigh it, it is even more important to compensate for the weight of the plastic cup. Instead of doing this entirely with water, you can include any number of small heavy objects, and add only as much water as is needed. Coins work very well for this, as do marbles, etc.Accuracy for this type of balance is a question of sensitivity. This sensitivity of this balance is good enough to permit the error in a measurement to be less than +/- .5 gram. This is what the box says, but you need to be good with this kind of thing in order for the error to be less than 1 gram. When you make a measurement, you eventually have the two sides balanced to where one side is heavier than the other by an amount that is less than 1 gram (in which case the error is known to be not greater than +/- 1 gram). At this point you need to use the needle and scale in order to obtain a measurement where you know the error is less than some increment smaller than +/- 1 gram. This requires a scale that is marked very exactly. Ideally you would use a .5 gram weight - which is not included - and make the scale yourself. Without having a .5 gram weight, you can make the scale yourself with marks at +1 gram and -1 gram. Then you need to visually judge whether the needle has or hasn’t moved more than half way to the +1 gram mark (or the -1 gram mark) on one side. This technique is less than perfect because the correct location for the +.5 gram mark is not exactly halfway between the 0 mark and the +1 gram mark (ditto the -.5 gram mark). If you want measurements where you can say with absolute certainty that the error is less than +/- .5 gram, you need a scale with precise marks at +/- .5 gram and also at +/- 1 gram. In order to make this scale, you need a calibrated .5 gram weight.It is generally necessary to pay attention to whether the needle swings back-and-forth freely, several times at a minimum, before it comes to a full stop. If it does not do this, it means that there is some friction somewhere, interfering with the motion of the beam (the “beam” is the moving part which includes the needle and the two self-leveling platforms). With most any balance it is necessary to pay attention to this, and this quickly becomes automatic. However the need to pay attention to this is a bit greater for this balance than it is with balances intended to be used for real work. If you detect that the needle does not swing back-and-forth freely, several times at a minimum, then you need to grab the two ends of the balance gently with both hands and move it around slightly to make certain that, given the slight amount of front-to-rear play in the position of the beam, it is not positioned all the way to the front or to the rear. Additionally, you need to make certain that the beam is not turned with one end slightly to the front and the other end slightly to the back.There is a minor rub, in the literal sense. The plastic weight that slides along a rail on the back of the beam (this weight allows you to compensate for any difference in the weights of the two buckets, etc.) is able to rub slightly against the upper portion of the base. If this occurs, it will create friction that will likely be rough and uneven, such that the beam will catch and the measurement will have a slight error. This error will be very slight, likely not more than 1 gram, so this is really nothing more than the slightest of annoyances. However, if this bothers you, there is an easy way to fix this. The little plastic weight has a small rectangular hole of sorts running from side to side; the rail passes through this rectangular hole. The front-to-back dimension of the rectangular hole is slightly greater than it ideally should be, which gives the weight a slightly excess amount of front-to-back play. A simple way to correct this is by making the rail thicker by adding a piece of stiff cardboard to the backside of the rail. Or if you have some scrap aluminum sheet the right thickness, this will be better than cardboard. Or some plastic of the right thickness. Whatever material you use, the thickness of the material needs to be just right, .7 mm to .9 mm, or 1/32”. The height needs to be 10 mm to 12 mm, or .4” (13/32”). The length needs to be 10 cm or 4” minimally, however in order to ease the task of attaching this piece to the rail, the length should be about 15 cm or 6”. If the thickness is right, you should be able to just barely slide this piece of material between the weight and the rail, on the back side of the rail, thus forcing the weight fully to the rear. After precisely centering this piece of material on the rail, the best way to affix it to the rail is by using some very thin double-sided tape, e.g., carpet tape, placed under both ends. If you deem it appropriate to use glue, I discourage using super glue for something like this, because the risk is too great of gluing your fingers to each other or to something else.This will likely solve the very minor problem, but if it does not do so to your full satisfaction, you will then want to remove the two little bumps located on the front face of the little plastic weight. To remove these two little bumps without removing the weight from the rail, the best tool will be a small wood-carving chisel with a flat cutting edge. However if you add a piece of material to the back of the rail as discussed above, it should not be necessary to bother with the removal of those two little bumps.Finally, there is the matter of the scale on the front. The balance as delivered has some little marks molded into the front of the base. It did not seem to me that these little marks were usefully located. As discussed previously, the marks need to correspond exactly to +/- .5 gram and +/- 1 gram weight difference between the two sides. To make it so, you have to stick a piece of white cardboard under the needle and mark the scale yourself. You ideally need to use a calibrated .5 gram weight to do this. You first use the calibration weight to get the needle perfectly vertical, then place the .5 gram weight on one side, mark the location of the needle, do the same for the other side, then repeat this using the 1 gram weight. If you really need measurements that are accurate to .5 gram, this is how you do that.

È stata acquistata per uso didattico. Perfettamente funzionante e resistente

Schönes Produkt, nur schade, dass die "Bausteine" zum abwiegen nicht dabei sind. Diese müssen separat erworben werden, was nicht so gut ersichtlich beim Kauf war.

Spielzeug hat gute Qualität. Jedoch das Kind hat nicht wirklich die Interesse dran gehabt

Alles top!

Haben die Waage zur Veranschaulichung (Mathe 3. Klasse) gekauft und war leider ein voller Fehlkauf. Sehr ungenau, wenig Gewichte, etwas arg „schrottig“. Würden sie nicht wieder kaufen, heben sie nun halt für den Kaufladen der kleinen auf. Gewichte sind absolut nicht ausreichend und die kleinen Grammstückchen unnütz, sehr wacklig. Unser Fazit: Teuer, erfüllt Zweck nicht.

Est muy bien pero le faltan los accesorios para que vana dentro de la canasta, por todo lo demás perfecto

Ich war auf der Suche nach einer Waage ⚖ um den Mathematik Unterricht und das anschauliche lernen von meinen Kind zu unterstützen.Es werden einige angeboten aber auch mit schlechten Bewertungen. Mein Gedanke dazu war, wenn ich mehr Geld ausgebe wird die Qualität stimmen.Leider ist dem nicht so. Die Schalen lassen sich schlecht auf die Waage setzen und liegen oft nicht richtig auf. So wird das natürlich alles ungenau.Bei dieser Waage ist es auch nicht so leicht zu erkennen welcher Behälter leichter oder schwerer ist. Denn die Behälter haben kein großes Spiel zwischen oben und unten .Auch der Pfeil ist da keine Unterstützung, denn der Pfeil ist grau und es gibt keine Beschriftung an der Waage.Im Ganzen wirkt die Waage sehr günstig, einfach verarbeitet mit dünnen Behälter. Der Aufsatz zum wiegen ist nicht sehr robust.Also keine Lernhilfe für Generationen, die weiter gegeben werden kann an Familie und Freunde, wenn das eigene Kind es nicht mehr benötigt.So wie unser 50 Jahre alter Rechenschieber ,der zwar nicht hübsch ist aber noch vollkommen in Ordnung.

I was looking for a weigh scale with weights to teach my children how to measure weight. I was also looking for an objective way to measure how much candy they could have, instead of guessing after every Easter, birthday, halloween, etc. There are plenty of electronic and spring balances but they don't really convey the concept of balancing.This balance has precise clearly marked weights that help them match up with food they are weighing (candy!), as well as allowing them to compare the weights of two things (such as two of their toys, or two very different types of candy).The holders are big enough for typical quantities that they use. And the mechanism is just complex enough for them to get interested in how to manipulate the measurement.The quality of the plastic seems somewhat fragile. We taught our children that it is equipment, not a toy, so they cannot carry it around and play with it. If it is handled over-enthusiastically, I suspect it will not hold up for a long time.

schöne Lernwaage. Gut verarbeitet. Die Kinder spielen gerne damit.Die Waage ist sehr präzise und die Gewichte sind ,praktischer Weise, auch mit dabei und könnengut in einem Fach verstaut werden und gehen so nicht so schnell verloren.