PicassoTiles Mix and Match 25 Piece Magnetic Puzzle Cube Set

My 4-year-old figured out how to build a little car from the cubes on her own, and now she won't put them down. They're small enough to toss in the diaper bag, so they've saved us at two restaurant dinners already.

The magnets snap together tight enough that the tree and car shapes actually hold when my son carries them around. Twenty-five pieces is the right amount for travel too, it all fits in the little tin we toss in the diaper bag.

My niece spent a solid hour building the animal shapes instead of asking for my phone. The cubes snap together firmly enough that her little tree didn't fall apart when she carried it around. Twenty-five pieces is just enough for two kids to share without fighting.