As part of our materials topic we also investigated which materials were waterproof. Mrs Goldsworthy needed a waterproof material to cover her Forest School equipment. However, she did have some very strange ideas of what materials she thought she should use, so we had to help her out. We planned another investigation, thinking carefully about how to make it fair again. We wrote predictions before we all took on our scientist roles to carry out the investigation. We were finally able to suggest a sensible material for Mrs Goldsworthy to use - plastic and not the felt that she had thought of!