Kids now have the coolest toys. Growing up, we had Lincoln Logs, Legos, Brick Blocks (generic Legos), and erector sets. My brother and I loved building things. But recently, we babysat a 4 year old, and she brought her magnetic tiles with her. These things are so much fun. We built rockets, towers, and a plain old houses. We used triangles to make squares when we ran out of squares. I don’t think these will every quite replace Legos for versatility (I don’t think I could make a ship out of them), but they are still a ton of fun.