- How many chemical reactions can you spot when cooking tea?
- How does meat change as you defrost it?
- How long does it take for your bath or the washing up water to cool down? Does it make a difference if you have bubble bath (or washing up liquid) in it or not?
- Find out when pens were invented.
- What did the first computer look like?
- Which colour of felt tip ink runs best on a piece of kitchen roll?
- How do shadows in your garden change over time?
You can download the challenge cards down below - you can cut them up and pick one ou random to have a go at (and there's space for you to add your own!)