Randall Standridge has a number that fit in that package. I've always like his 'Zooveniers' because it's got some flexibility for performance built-in, but also lots of goofy sound effects the kids have fun with. He also has his Darklands Symphony that a lot of people play the march from. Darklands Legends is Movements 2-4 and has some fund parts too. His Witching Hour is on the tougher side of what you're asking for, but my kids love that one and I've had younger siblings beg to play it years later.

Scott Watson has a piece called Hercules vs. the Hydra that's very cinematic and goes together well that would be on the easier side.

If you're looking for something completely different check out Alex Shapiro's PaperCut.