Science roadshow

At the roadshow it had heaps of inventions their but before we could do any of the fun stuff we had to sit down and watch a small. Firstly they asked for three voulenteers .The first one came up to the front and she blew bubbles in a straw which led to a glass cylinder. The water turned yellow because she blew in liqud nitrogin and it landed between 2 and 3. After that we got to go  and do something. I first walked to this bike and it was attached to another bike which had a skeleton on it . When you ride on it you look at the skeleton to see how your bones move.All I learnt was how our bones work when we ride a bike and I liked everything else to.