I don't know specifically where they serve them in children's drinks, but my DD LOVES them! When at LeCellier last month, they do not have one in a children's drink, but I asked for them to put one in her shirley temple, and they charged me $4. I would think anywhere in general who has them would do this. It was well worth the $4 for us (on vacation!). You should have seen the ooohs and aaahs from the kids at other tables when DD got her drink. She felt like a celebrity! hahhah
Good luck, and have fun!!
By the way, we took it home with us, and it still works! Every once in a while I'll throw it into her dinner drink, more pixie dust! hehehe DH has even been known to throw it into a cocktail from time to time. Yes, we are easily amused!