I am the exact same Valerie. What a simple yet practical and effective way for younger classes to explore the concept of rockets. The plastic cartons reminds me of asking pupils to bring materials in for Junk Art in Aistear. It just shows how everyday items can be used in so many different ways in the classroom! I will have First Class in September so when it comes to teaching this, I feel I will start with the Rocket Mice and then progress to the Fizzy Rockets if I feel the pupils are able for them.