Kikkerland Sparklz Wind Up Gear Box - Fun Mechanical Toy for Kids & Adults, STEM Educational Gift for Birthday & Christmas - Perfect for Home, Office & Classroom Play

These are creative, well made and apparently too fascinating for my own greedy good. I've bought a batch of these. My grandchildren, who specialize in seeing how fast something can be destructed, keep playing with them and make it clear that grandpa should consider giving them away. I can't resist them, so I do give them away and keep having to buy replacements.Every one of these I have or had, including those I've given to my demolitionist grandchildren still work. I kind of wish a few would break so they wouldn't be so fascinating to them. These are really decent, quality toys, especially considering the reasonable selling price.I'll have to hide any new ones I buy, at least for a while, so I can get to play with them!