Step 4: Front and back triangles bolted together
After cutting up the little girls' donor bike and unbolting the rear suspension triangle from a mountain bike I connected them together. I used the seat binder bolt and two 1/4" by 3" U bolts to attach the little girl bike front end to the macho mountain bike back end. ( That reminds me... at Maker Faire a visitor looked at my collection of home built bikes and said it was like Syd's land of the misfit toys from "Toy Story" .) I resemble that remark because I do enjoy combining disparate objects to help people get new ideas.