Brought to you by BALLOON BONANZA Learn about static electricity with a series of fun activities using a simple balloon. You will need an adult to help with these activities. What you need • Two inflated rubber balloons • A volunteer with steady nerves • One lighter • One adult to do all lighter duties • Water • Waterproof outer wear Challenge 1 What to do 1. Partially fill one balloon with some water 2. Inflate both balloons with air 3. (Parents only) holding the balloon filed with air over the head of a volunteer, light a flame underneath the balloon and watch carefully to see what happens! 4. (Parents only) holding the balloon filled with air and water over the head of a volunteer, light a flame underneath the balloon and watch what happens! What’s happening? WOW! So the balloon containing nothing but air popped, while the one filled with air and water didn’t. The flame under the balloon with nothing but air simply heats up the rubber and the air inside so it goes POP! The other balloon, filled with water doesn’t pop because the water is really good at absorbing all that heat and redistributes it away from the rubber so it does not burst. Of course, if we kept the flame under the balloon for long enough, if would eventually pop and your brave volunteer would be covered in water! COSMOS membership is powered by Cambridge Science Centre, join today at cambridgesciencecentreorg/cosmos Brought to you by BALLOON BONANZA What you need • Inflated rubber balloon • Wooden kebab skewers • Steady nerves Challenge 2 What to do Your challenge: pass a wooden kebab skewer through a balloon without the balloon popping Have you tried? Did it pop? Here’s some tips! 1. At the base of the balloon where it is tied the material may look visibly darker. It may also look visibly darker at the opposite end, directly on top of the balloon. 2. Pierce the balloon at one of these ends and follow through directly across pushing the skewer out on the other side. What’s happening? So if you went through the side, your balloon popped straight away or started to deflate almost instantly! This is because the skewer tears the tightly stretched rubber. But what happens if you went through the neck or the knot of the balloon? The material there is not as tightly stretched and when you push the skewer through those points, the molecules the rubber is made of are simply pushed around the skewer and the balloon does not pop. Try again and see if you can do it this time round! COSMOS membership is powered by Cambridge Science Centre, join today at cambridgesciencecentreorg/cosmos
© Copyright 2026 Paperzz