Homemade Easy Automatic Balloon Pump

Here's how to make a homemade easy automatic balloon pump:
Materials:
 .Balloon
 . 40 ml of water
 . 1 spoon soda sodium bicarbonate.
 .Plastic Bottle
 .lemon juice
 .Juice straw

Procedure:
1-Add the 40 ml of water to the plastic bottle.
2- Add the spoon of soda to the bottle also and mix the soda and the water using the straw.
3- Add the lemon juice to the bottle and fastly stick the tip of the balloon on the head of the bottle.

And now watch the balloon getting blowed automatically using that bottle!!!