Legos are a long-standing favorite here among the Scientist Approved team. Being able to build a lego Batmobile or Star Wars Death Star makes Lego transcend ages. Of course, some of those sets are pretty expensive, and the truly best part about Legos is the ability to make your own creations with the parts available to you, where your imagination is the limit. If you ever feel you or your kids hitting a wall with your Lego building, check out this Chain Reactions kit from Klutz. Taking inspiration from the creative, yet complex, creations of Rube Goldberg, expand your imagination with some clever engineering to generate machine sequences of your own with Legos! String together some of the ‘reactions’ in this kit to create sequences that will wow your friends and family. This kit comes with instructions for several examples, paper ramps, string, lego pieces, and anything else you’ll need to create creations to spur the imagination. Recommended for ages 8 and up.