Observatory

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

In the Observatory, Polly announces that she has sent one of her father's spaceships, containing a Mission Clue or Inventions Points, into deep space. She then beams a radio wave containing a clue as to the spaceship's whereabouts into a black hole. The user must then blast the clue out of the black hole before it is "sucked into another dimension" and then decode the clue with the Professor's Alien Signal Decoder-which he claims Professor Spark hasn't been used in a while since there are no alien signals to find-in a grammar activity. Once the hint is unscrambled, the user must use a star chart to determine which constellation Polly has sent the missing spaceship to.