Happy Homework 2.0: Effects on 24-hour Movement Behaviours in Children

The aim of this research is to trial a new version of Happy Homework (HH) on children and parent health outcomes. HH was previously a paper-based 8-week program designed to encourage positive eating habits, physical activity, and healthy sleep routines among children at home. By working together, investigators are aiming make sure HH is easy to use, that it reduces teachers' workload, and enable the students to easily track and engage with HH. We also hope that this will all help contribute to the students meeting 24-hour movement behaviour targets. Children are invited to participate in the research study. In the study investigators are going to examine children's activity behaviour profiles, and the following measures will be taken: * Physical activity levels * Sedentary behaviours * Sleep duration * Body mass index (which can be self-reported by the child). These measures will be conducted at two time-points; (1) 1 week before the intervention begins and (2) 1 week after the intervention. Should children agree to participate in the study; children will wear an accelerometer on their non-dominant wrist and a small device on their right thigh for 8 consecutive days at both time points, along with having their height and weight recorded (the child can self-report this information).

Inclusion Criteria: * children aged 8-12 years old. Hold the ability to carry out homework tasks via digital platform, mostly independently. Exclusion Criteria: * children outwith the age range.