We wanted to find the best material to fix a whole in Mrs Bush’s umbrella.

The material needed to be waterproof and strong.

We tested lots of different materials.

Our experiments showed that cellophane and tinfoil are both waterproof. But we also found out that tinfoil tears easily.

We made our own umbrellas, selecting the material that we thought would keep us nice and dry.

Then we tested them in very wet conditions!

Unfortunately, Mrs Green chose the wrong material for her umbrella and she got very wet!