In this video you will learn to make a wonderful water fountain with very simple materials. For this you will need a balloon, a plastic bottle, a bendable straw, glue and a pair of scissors. Make a hole near the mouth of the plastic bottle which scissors. Insert a straw in the bottle and secure the hole with help of glue. Fill the bottle with water. Now blow a balloon and hold the neck with fingertips. Carefully fix the balloon on the mouth of the bottle. When you release the air from the balloon, it creates pressure in the bottle. And thus pushes water out creating a wonderful water fountain. So let's look at what actually happens in this experiment. The air inside the balloon is under higher pressure. When you place the inflated balloon on the mouth of the bottle, the air pressure on the top of the bottle increases. This pushes down on the water in the bottle, which rises through the straw and comes out making a little fountain. Instead of a single straw, you can also fix 5 straws in the bottle. You can fill the water in the bottle and fix an inflated balloon. You will see an elegant fountain with 5 streams. Make your own pressure fountain and have fun. We hope you enjoyed this experiment and learnt something new today. For more such hands-on science and mathematic activities, visit our YouTube channel, I sir Pune Science Activity Centre. Thank you.