When he is riding his bike we always take a bag or back pack, because he collects the whole time. Mostly flowers will be picked by the dozens. But, if he finds the smoothest rock or unusual button he will grab that up too. He loves the way the flowers feel and he shares with his Mommy. I love walking with him. Unfortunately due to his social anxiousness we don't get to do this nearly as much as I would like. But, I treasure every time that we do.