Tea Bag Rockets

In a continued attempt to draw The Big Boy away from a screen, we embarked on some science experiments over the weekend. This one was quite interesting. You need a few of those tea bags which have tags attached (we choose some disgusting licorice ones from the back of our cupboard). Open the bag out, get rid of the tag and string then empty the contents. Open it out into a tube shape, standup on a tin tray and set fire to the top. It burns down quickly then the ghostly ember flys up into the air much to the fasination of the children. The Big Boy, who's a bit good a science, tells me it all to do with convection currents, or something like that, but it's all too much for my little arty brain.