We often come across things that have been mixed together. If you pour muesli into a bowl at breakfast time you can see that it is a mixture of things like oatflakes, fruits and nuts. Another, not so tasty, mixture might be the paper, glass and tins in a recycling bin. The things in a mixture don't join together to make something new. They can be separated out.
These beans and peas make a colourful (and nutritious!) mixture. With a lot of patience they could be separated into small piles of different peas and beans.
Let's look at some of the ways we can separate a mixture.