you will have a great time at BB. i saw quite a few slides that were of the kiddie vareity and the kids that were on it seemed to definitly be enjoying themselves. i think there is plenty for all of your kids and yourself to really enjoy your day at BB
the lagre innertube ride that ladydancer mentioned is one that the entire family can enjoy. big tube lots of room and lots of fun. the only thing that may scare her with this ride you do have to go up a fair amount of steps and i believe you may be on an overlook platform that is pretty high but if memory serves me correct i think you can see the tree of life in AK from up there. the view is pretty breathtaking for there. i wish i had my waterproof camera then!