mellyboo...while Spelling Bee is probably the funniest thing I've seen on the Broadway stage in a while and while it's an adorable show with a great heart...
I don't think parts of it'll be appropriate for your 8 year old daughter.
Being so young and assuming that you want her to be impressed with a show based on solely spectacle...I suggest Young Frankenstein or (of course) Mary Poppins. The set, colorful costumes, big dance numbers, and special effects will be very appealing to the eyes of a child. Plus, what 8 year old child doesn't love Mary Poppins?
I hope this helps...
"Somethin's comin', I don't know what it is but it is gonna be great!"