This could be how childrens bikes could evolve to save space
http://www.kickstarter.com/projects/1266956401/ybike-evolve-3-in-1-kids-trike-bike
Could this be the evolution of childrens bikes?
This could be how childrens bikes could evolve to save space
http://www.kickstarter.com/projects/1266956401/ybike-evolve-3-in-1-kids-trike-bike