Magic School Bus Explores The Rainforest Cheats (PC)

To get to listen to some hidden songs, follow these steps. When you're in the classroom,
go to the left side by clicking the wind-up toy. Next, click on the bottom-right locker
door to get to select a game. Choose Animal Chorus.
  To listen to a song about birds to the tune of Jingle Bells, drag the two birds into the
jungle.
  If you want to listen to a song about monkeys to the tune of Flying Trapeze, drag the
two monkeys and the jaguar into the jungle.
  Finally, to hear a song about poisonous frogs to the tune of the American song that is
not the Star Spangled Banner, drag the two frogs into the jungle.

Go to the left side of the classroom by clicking on the wind-up toy. Then, on the lower
right locker and select the "Animal Chorus" game. Then, drag the two birds, two monkeys
and jaguar, or two frogs into the jungle to hear one of three more songs in the game.