I remember reading this one book with the main characters when I was younger, but don't remember the title, perhaps the following description can jog someone's memory: Dr. Bunsen Honeydew creates a whole bunch of small chomping creatures to clean up the Muppet Theater, but they work all too well and eat the whole theater down. Our heroes are thus forced onto the road to get the money for repairs (some ridiculously odd figure like $39.97). Along the way, I recall they unwittingly end up as prizes on a game show (HOST: Would you rather this new car or this bunch of weirdoes for your bonus prize? CONTESTANT: I'll take the weirdoes. They'll look great on my patio), do some skydiving (Kermit ends up with a defective parachute and almost ends up a flat frog) and run into Fozzie's sister before achieving their goal. Does this ring any bells?