yeah, at the shop outside the stunt show (when you come out of the stunt show go right). it is that little outside vendor type place with all the indy gear. If you don't see the child size hats, ask..they may have them in the back. We got them for the kids and dh a few trips back...then they all wore them to the show and met the stunt indy and had their pics with him...it was so neat!! my dh also got a replica whip...which they had to send back to the room he couldn't carry it through the park b/c they considered it a weapon.
eta: i think we paid almost 40/hat for the kids...they are not as solid/sturdy as the adult hat, but we bought them jan 07 and they still have them now and wear them all the time(literally 5 days a week they play indy), so they do last.