ok, first of all, u have a lot of great material. here's what i think u should deffinetly perform:
Strat o sphere
Square circle deception-i love the idea u made with this!
Sponge bunny routine
Mini hippity hop rabbits
Rope stuff-kids love it, as long as it's short, like cut and restored rope. don't do it long though, 1-3 tricks is good
appearing 8 foot straw-maybe think about getting the ghost bottle with it (google it), or get a refilling glass (don't know what's the exact name...), both would work very well with the straw, coz ur'e still thirsty, u havn't drink...
Coloring book w/crayons
ok, now for the stuff u shouldn't be performing:
because ur on stage, i wouldn't do any card tricks, unless it's with jumbo cards. so i wouldn't recommend performing NFW, they'll just think u did like a sleeve change, card changes that r not visual rn't good on stage.
out of this world-deffinetly not for stage! i mean, it needs a table.. not very good if u ask me.. it's also VERY long, the kids won't see a thing, get bored, and won't be so amazed from the effect.
tricks that maybe would work on stage, dependse how u present them and how u handle them. it also dependse on the way u dress (get "magic on stage" with jeff mcbride for some advices on that):
Buddha money mystery
hope this helps a bit... if u REALLY want a card trick on stage, then perform the invisible deck with Bill Malone's presentation (from "on the loose")