Full article with more pictures - How do balance bike yourself.
Disassemble my balance bike to win the seat and took photos at the same time for this statement.
So, we need a sheet 12 mm sanded plywood, a set of bolts and studs piece (you can rod) by 6 mm, slice fanerku 4-5mm seating foam of 50 mm and a piece of leather / fabric upholstery seat (I had a sofa fabric) , and of 12 "wheels from the children's bike, but it is better as any wheel from the carriage, because I turned balance bike 4 kg, and from 2.5 - wheel ... like from strollers, would weigh about 3 kg just ...
First, it turns out that something like rough wooden socks and then this. (After skin, etc.)
The size of the longest piece (sides) - 600 mm. Other details of begovela - proportionally. At the bottom is a link to a photo in a higher resolution, if you wish, you can print, put the net and transfer the drawing on the plywood.