How can a 10 year old widen his bum?

To promote healthy growth and development, a 10-year-old should focus on overall fitness rather than specifically targeting body shape. Engaging in regular physical activities like playing sports, dancing, or doing exercises that involve the legs and glutes, such as squats or lunges, can help strengthen and tone muscles. It's also important to maintain a balanced diet rich in nutrients. Always consult a parent or guardian before starting any new exercise routine.