How are the stars similar to the sun in our galaxy? Learn all about the solar system with a reading excerpt about the sun and the stars. Kids read an informational passage before they answer questions about reading comprehension,...

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]

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.