Today with Jo away sick, I built a helicopter spinner before Kate arrived and let her know what I had done. (She had expressed a desire for one to Jo last week, and I didn't think there would be much time to help Kate build her own later in the day.) After she finished sculpting a playdough bug, Kate came and got me and asked if we could go outside and try it. I started the ball rolling and then she began to experiment. My design however wasn't how Kate imagined her one will look, so though she became very attached to it, I suspect she'll be building her own soon.