Shrinking Machine Room

thumb|300px|right The Shrinking Machine Room is one of the activities in JumpStart Adventures 3rd Grade: Mystery Mountain.

The Shrinking Machine Room contains a device called the Shrink-O-Matic, which can reduce anyone or anything to the size of a molecule, and a shelf filled with specimens cared for by Egbert. In the game, Polly provides a hint and the user, using Egbert's analyzer, must determine which specimen her hint refers to. Once the specimen is found, Botley is shrunk down and the user must play a Breakout-like game with him to find the hidden Mission Clue or Invention Points.

This game is based on the '60s movie, Fantastic Voyage.