balloon madness

last week we were learning about isaac newton's third law and when there is action there is an equal or opposite reaction. we taped a balloon to some straw and then put the string through the straw so when we blew it up the action made a reaction. here a some pictures.  

try it at home all you need is tape,a straw and a balloon

i found it hard to get it to move at the right speed because each angle has a different reaction and it depends on how much air is in the balloon

i found it easy to get the balloon moving because the less the air the faster because when it has lots of air it using heaps of pressure to slow it down