Are you looking for ways to deepen children's understanding of measuring mass? If so, this Year 1 Measure Mass activity is perfect for you! This worksheet has been designed to be completed in pairs or small groups so that pupils have the opportunity discuss their understanding. The question is open-ended so that children can come up with a range of possible answers to balance the scale. A modelled answer page has been included which can be used as a prompt to support children to then find other possible solutions.