UGEARS STEM Lab Model Kit - Creative 3D Wooden Puzzles for Adults, Teens and Children - DIY Mechanical Science Kit for Self Assembly - Educational and Engineering 3D Puzzles with App (Counter)

The kit consists of four wooden panels pre-cut by laser with press-out pieces. In addition there are rubber bands and wax to lubricate moving parts, and an easy to follow instruction book. The completed machine can count by operating a 'plunger' or by turning a wheel, and can be reset to zero (or to any number) by opening the front, which disengages the number wheels from their gears, enabling them to be turned independently. I don't know how long it will last, but it seems quite sturdy and even has rubber feet under it (made from a rubber band). Only negatives is some parts can be quite hard to press out (there is a tool provided), and it takes quite a bit of pressure to press some of the parts together. Also, eventually the rubber bands (that act like springs) will eventually decay and break, I expect. (It would probably be possible to repair it if this did happen). But worth 5 stars as an entertaining puzzle as well as educational.

I got this for my 9 year old niece for her birthday. I’ll say i was really impressed by the quality of the pieces and the instructions. She also really liked it. My only issue with it was that it was too hard for my niece to assemble it. It needed too much force to push the pieces in their places. I, a 30+ year old, had to push/squeeze hard to get the pieces in. I did enjoy it though, and i think anyone who enjoys DIY and handcrafts would enjoy it.

I think the age rating of 8+ is optimistic, I imagine a lot of 8 year olds would struggle to assemble this on their own. I helped assemble this with a 11 year old and we enjoyed it and the finished item was satisfying and worked correctly. But many of the parts are hard to assemble, and will require a lot of perseverance, and breaking one piece could be the end of it. So I would recommend it for 8+ where there is an adult to help when needed. But some adults might enjoy this as a gift also.

All component parts are accurately laser cut and easy to push from the plywood sheets. Fitting the parts together feels smooth and positive and the assembly instructions are adequate. All in all an excellent way to fill a few hours.

Amazing mechanical calculator to put together with kids. It stuns kids and adults every time.

Fiddly and didn't work at all smoothly. Not suitable for kids under 12.

I like the way the model tumbles about when I press the plunger. It makes the decision more believable than tossing a dice 😀 It has NO and LATER to allow me to not do something every time but YES and DO IT NOW also come up! I found I needed to do a little sanding and be consciencious with the waxing, it is not a beginner model. I haven't stuck mine together with glue yet but I might to avoid problems as bits loose up with use. Okay for me - who'd trust something that was too easy?!

Instructions are fairly easy but how it shows elastic band sizes could be made clearer, otherwise not too bad, a bit more complicated than the last kit I got but still fun all the same. You don't "need" glue but a few drops here and there on joints that don't move doesn't hurt.

Child liked and felt challenged when building.

Ein wirklich rundum gelungener Bausatz, der Counter. Alle Teile sind vorhanden, für viele gibt es sogar Ersatz auf den vier vorgetanzten Holzplatten und alle sind genau beschrieben und durchnummeriert. Die Teile lassen sich mit ein wenig Geschick problemlos herauslösen, wenn es wirklich mal etwas hakt: Ein hilfreiches Auslöse- und Montagewerkzeug ist als Teil H (für "Hilfe"?) gleich in der rechten oberen Ecke der ersten von vier Platten. Ansonsten hilft ein kleines Cuttermesser weiter. Es muss nichts verleimt werden, sondern nur gesteckt. Mir ist dabei nichts abgebrochen - ein wenig Vorsicht und nicht zu brachiale Gewalt gehören natürlich dazu. Wer sich genau an die sehr ausführliche 23-seitige und farbige Anleitung hält, kann praktisch nichts falsch machen. Wichtig: Immer nur die angegebenen Teile herauslösen und verbauen - also nicht gleich auf einmal alle Teile herausbrechen - die bekommt man dann kaum jemals wieder sortiert. Ansonsten ist wirklich alles enthalten was gebraucht wird, auch die Gummibänder und Wachs - und das ist wirklich notwendig! Die entsprechend beschriebenen Teile, die zu schmieren, also zu wachsen sind, unbedingt auf Leichtgängigkeit prüfen - ansonsten hakt und klemmt das alles und wird nicht zum Erfolg führen. Kann man den Bausatz jedem empfehlen? Ja, sofern Geduld und ein wenig Feinmotorik vorhanden sind.

Et c’est bien amusant à bâtir

Great product that my kids love. Well made and fun to assemble. I have a lot of them and each one has been a fun project.

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