University of Colorado
University of Colorado: Ph Et Interactive Simulations: Balloons & Buoyancy
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.
PBS
Pbs Kids: Design Squad Challenge: Balloon Drive
Hands-on challenge "to make a helium balloon hover in one spot, then move it through an obstacle course using air currents". Provides full list of materials with ideas on how to design, build, and test the balloon's movement. Activity...
![The Engineering Place: Balloon Flinking [Pdf] Lesson Plan](https://content.lessonplanet.com/knovation/original/172615-2de503a48a3b9f1faaa61527a0b2e7e4.jpg?1661554798 "The Engineering Place: Balloon Flinking [Pdf] Lesson Plan")
Google
The Engineering Place: Balloon Flinking [Pdf]
A lesson plan and activity sheet on buoyancy. Students add weight to a helium-filled balloon to keep it suspended so that it won't float or sink, but instead will 'flink.'
TED Talks
Ted: Ted Ed: Helium: Periodic Table of Videos
The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about helium, Donald Duck voices, and floating balloons. [4:45]
Other
Virtual Chembook: Density Applications With Gases
DENSITY is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume. For...