Vortex Cannon

Hi everyone today we were watching the kid should see this and we saw two people making a homemade vortex cannon... AWESOME!  So we gave it a go. We had a large box and cut a hole, then someone went to the office and asked if we could borrow some wide tape. Soon the only thing that air could go through was the hole. Then we had some plastic bags and BOOOOOOOM! Incredible, it shot right off the table some more people had a go then Mrs Donnelly got some paper cups BBBBBBBOOOOOOOOOOOOMMMMMMMM!!!!!!!!!!!! Amazing.   Many more people had go and now we are making our own!