Balloon on a Bottle

In this activity, students brainstorm various ways that an uninflated balloon placed over a bottle's opening can be inflated without touching the balloon.

Grade levels

Lower Elementary, Upper Elementary


  • Teacher preparation: 20 minutes
  • Introduction for students: 10 minutes
  • Student activity: 30 minutes
  • Class discussion/analysis: 10 minutes¬†

Learning Objectives

  • Students learn that air's volume changes with temperature
  • Students learn that air can both expand and contract depending on whether its temperature increases or decreases
  • Students learn that warming air increases the volume inside a balloon, no matter whether the balloon is pointing upwards, to the side, or downwards.