Tree-fu Tom is Free-fu tom

My little boy was given a caterpillar to look after for a couple of weeks. When he changed to a chrysalis, he returned "Tree-fu Tom", as he was named (after a TV character) to nursery, to join the others in their tank. Today we all met up in the local park to see them all set free. This one landed on R, and was reluctant to leave. We'd like to think it was our little friend saying goodbye.