Space is a key area of science that is often taught in year 5 (ages 9-10) in English schools and related to this is gravitational force. Almost without exception children enjoy learning about the solar system and beyond. This article introduces a series of activities for children to explore the formation of impact craters in the solar system. The activities are designed to provide opportunities for children to apply their mathematics and English knowledge and skills. Children focus their investigation using the fairly familiar context of craters on the Moon. The key learning outcomes for the children are: (1) to be able to describe and then explain their observations of the Moon's surface; (2) to plan and carry out an investigation into what affects the size of a crater; (3) to collect, record and display quantitative data; and (4) to apply data to solve a problem.