There are custom umbrellas in DL, too, in NOS, by the entrance to CO. How about afternoon tea at S55? They do a very nice tea for children (sometimes adults order it, too!). Even if the tea is booked for your dates, keep looking for cancellations -- we've found openings that way. Agree with the pp that Musical Chairs at Refreshment Corner is fun! Kids of all ages are invited to join. WOC Dessert Party (pricey, but very fun -- and a good way to get a great view for a 6 yo) -- and WOC is totally unique to DLR. Dance with her on Rte. 66 when the Sh'boom song plays as the neon lights go on in Cars Land -- very fun, just like in the Cars movie. Maybe the Frozen Dining Package at CCR? A nice prix fixe meal (complete with special Olaf dessert) and first choice of seats for the Frozen show in the Hyperion Theatre. There is face painting in DL by the Matterhorn (on the way to the Small World mall area) and in DTD. And last, but definitely not least, maybe a Fantasmic! Dining Package? Blue Bayou would be my choice, since dining inside POTC is unique to DL and that viewing area is our favorite. F! at DL is the better show (pretty much the unanimous opinion here from people who've seen both shows) and getting a good viewing spot can be difficult. Whatever you choose to do, make magical memories and have a wonderful trip!
By the way, is there a birthday or special event involved? Even if there isn't, you can order a custom cake to be delivered to any TS restaurant. Call Disney Dining (714-781-DINE) to ask about this and do a search on this forum for the custom cake thread (recent posts include photos).