I remember this episode from the second season. Rowlf receives a flyer in the mail saying that a music company was holding a song writing contest. Rowlf decided to write a beautiful piano piece and record it on tape. Then all the other babies wanted to write songs too. After that, Kermit and Piggy wrote a country song together, Fozzie wrote a comedy song about chickens crossing the road, Scooter made some funky computer music, Skeeter started up a marching band, Gonzo imagined his own rock and roll band and sang Weirdo Troll, Bunsen put Beaker in a one man band machine and it went berzerk, Then Beaker started singing, Row Row Row Your Boat, in MEEP MEEP. And finally, Animal started playing wild drum music, beating on everything.
When Gonzo tried to rewind the tape, he got tangled in it. They had to cut him free and tape the entire cassette back together. Then they mailed it off to the company. A week later, they heard the winning song on the radio. It was theirs. But since they had to cut up the tape earlier, all the songs got mixed up into one weird song. And the announcer said, "That song was written by not one, but 10 talented Muppet Babies!"