LittleBigPlanet 2 - Chapter 5: Up And At 'Em
Full Walkthrough: http://www.gamefront.com/little-big-planet-2-walkthrough/
Head left from the start and hop over the flaming coals to reach a couple of Prize Bubbles.
Head right now and use the bounce pads to grab a bunch of more prize bubbles.
Continue heading right and eventually you'll reach a checkpoint and a caterpillar that you'll be able to ride.
For the most part, this is a pretty easy level. You can control the speed of the caterpillar, and he is a pretty easily manueverable creature. Just note that you can't move backwards very well and if you don't keep up with the screen scrolling, you'll be killed.
All of the prize bubbles for the remainder of this level are pretty much all in plain sight, but you'll need to play through the level multiple times in order to get them all.
The one collectible that might slip under your radar is the key to the challenge room. This is located about 3/4s of the way through the level in a cradle in the middle of the stage. You'll need to give yourself enough room to rush up and then move backwards into the cradle to grab it.
Full Walkthrough: http://www.gamefront.com/little-big-planet-2-walkthrough/