Click the balloon to add hydrogen gas to it. After this, you can click the flame and touch it on the balloon to see the reaction. If you want to know why it happens, click the "Why This Happens?" To do it again, refresh your page. Tags: #Science #ScienceFair #Science Fair #TheCoolStuff #The Cool Stuff #Chemistry #Physics #orange #blue #fire # hydrogen #airpumper #why
