Growing Caterpillar Science is a low-prep, high-engagement practical science lesson for ages 5–11. Pupils make a caterpillar from a tightly rolled paper towel and investigate what happens when water is added. The resource develops prediction, observation, evidence, recording and scientific explanation, with clear KS1/KS2 differentiation. Included: full teacher lesson plan, timings, learning objectives, vocabulary, curriculum links, assessment prompts, differentiation, KS1 worksheet, KS2 worksheet, teacher answer guidance, and an early-finisher colouring/extension page.