A fun experiment to do at home with your kids. If you don't have Acornkids Angel Powder use bicarbonate soda instead!

 

  You will need:

small drinks bottle
balloon
angel powder (or bicarbonate of soda)
vinegar
funnel
teaspoon
    
  Step 1

Using a funnel, pour about a third of a cup of vinegar into the bottle.
   
  Step 2:

Slide the balloon onto the funnel as shown here
   
  Step 4

Put two teaspoons of Angel Powder onto a teaspoon into the balloon. 
Remove the funnel from the balloon.
   
  Step 5 

Twist the neck of the balloon to stop the Angel Powder from falling out. Then stretch the mouth of the balloon over the bottle,taking care not to let any of the Angel Powder drop into it.
               
   
  Step 6

Hold the bottle, lift up the balloon, untwist the balloon neck and empty the Angel Powder into the vinegar.
   
  Step 7 

The Angel Powder and vinegar mix together, they create a gas called carbon dioxide. All gases expand to fill any available space, so the carbon dioxide inflates the balloon