 Upon collection of the accelerometer and completed parents AST report forms, childrens AST form will be filled out in the classroom retrospectively in relation to the five previous school days mornings. The only question to be asked to children in relation to the five days is: e.g. On Monday did you walk or cycle to school, all or part of the journey? At the end of the baseline week, those complying with the study protocol will be rewarded, as stated in advance on the information materials: a prompt return of the completed parent AST report form and undamaged accelerometer, and completed child AST report form in the classroom, will be essential requisites for receiving a 5 thank you voucher. 