Children who are witnesses to crimes are often seen as unreliable as their memory ability is still developing. Yet, a new body of research has challenged previous beliefs, by providing evidence that young children can assess their own memory because they know when their memories are accurate or not. In this study, we are inviting typically developing children aged 4 to 11 (Reception to Year 6) to understand if confidence (e.g. "I'm sure/not sure") and gestures (e.g. shrugs) can tell us if children understand their own memory ability. Children will receive a £10 Amazon voucher and certificate (can be used in the UK only).