Defeating Sleeep

I really need some suggestions for places. I've already got one from one of my friends not on here, but it would be highly difficult. She suggested this: " OOOH! GAEA HAS DREAMS! She likes to dream of what her perfect world would be, and she has the most powerful dreams. They go deep underground and sleep, transporting into Gaea's dreams(that's just an idea, you don't have to use the way I put for how they get into Gaea's dreams.) the orb is protected by all her children, and shes protecting it because she never wants the dream to end because she loves all her children. They get the orb somehow, and break off a piece and give it to Gaea, so she will dream like that forever and never wake up again. They leave, and give the orb the Morpheus. In return, he wakes up there parents, but no one else since they gave a piece to Gaea, now the parents and the kids seek Morpheus to wake everyone up."
While this is a great idea, it's really complicated and not at all easy. It would also be paradoxical because these are GAEA'S dreams and in her dreams, her kids would win, so it would be really difficult to write. I mean these kids are 10-12 years old with little to no fighting experience so it kind of needs to be a simple quest just complicated enough to challenge them. Please make suggestions!

Notes

PLEASE HELP ME!!!!! I'm stuck here and I've been writing this book for God knows how long! Please! Give me some suggestions.