Creating this make will help to develop your child's knowledge and understanding of the world around them, and how things work - in this case, how toilets flush. The activity will also help to improve their hand-eye coordination and fine motor skills as they help assemble the different materials to make the mini cistern. The make is quite difficult and you'll need to be on hand throughout to help your child.
How to extend the magic
Take off the lid on your toilet and let them have a closer look at a real cistern - the one that makes your toilet flush and fill up with water. Your child will probably be fascinated by the inner workings of your loo!