Originally Posted by carpediemracing

We have a Specialized Hotrock (that's the bike he grabbed) but it's about 5" too tall for him in terms of leg length touching the ground, and he can barely reach the pedal at the bottom of the pedal stroke. It's a smaller style 12" wheel bike. The strider frame I roughly sketched out would have the sitting area at about 12" off the ground, although I'm thinking that 10" might be better (figuring out an easy way to adjust height). If the plan works with the wood I can just make more frames. The original wood strider bike is from footcycles.com and it's huge.

Footcycles bike (they're out of business I think). I think his saddle height should be about where the bottom of the (fake) spring sits, or thereabouts. The bike is 2-3" longer than the Hotrock.