Time to get the youngest started, she's 2 and she loves bikes, so I hacked up one my many 12" bikes after I acquired some scooter wheels and put together a balance bike for her. Even though I cut the seat tube and lowered the clamp as far down as it can go, she can only get the tips of her toes to the ground when she is on the saddle. She's growing quick though, and I'm hoping to have her riding sans training wheels before she turns 3 this summer.