Terra Kids Catamaran DIY Activity Kit

The catamaran actually floats once it's built, which I honestly wasn't expecting from a kit like this. My 8-year-old put the hulls together mostly by herself and spent the whole afternoon sailing it in the bathtub.

My 9-year-old put the whole catamaran together himself in about an hour, and the instructions were clear enough that he barely needed me. Watching it actually float in the bathtub was the best part — he's already asking to take it to the pond.

My 9-year-old needed a bit of help snapping the hull pieces together, but once it was assembled he spent the whole afternoon sailing it in the tub. The step-by-step instructions are clear enough for kids to follow mostly on their own.