Ryan was the last to surrender his and I think that having his 2 BFF's (1 of whom I taught in my drive way last week) and twin brother riding was motivation enough.
I am a firm believer in this method. It has now worked in my teaching 6 kids ranging in ages from 7-barely 4....in a matter of 5 minutes or less.
I'd also like to add....that we practice better bike safety than this. I was cleaning up the yard of bikes and jump ropes when Ryan jumped on and wanted to "show" me that he could ride. I gave him one time around the drive way to show me so that we could record it.
