1. Swimming: Swimming is a whole-body exercise, which can exercise all parts of the body and has little influence on joints, and is suitable for children of all ages.

2. Skipping rope: Skipping rope is a simple and easy-to-learn exercise, which can exercise cardiopulmonary function, improve physical coordination and enhance muscle strength of lower limbs.

3. Badminton: Badminton can exercise children's reaction speed, coordination and flexibility, and also has a good exercise effect on children's cardiopulmonary function and muscle strength.

4. Yoga: Yoga can help children improve their flexibility, balance and attention, and it has a good promotion effect on physical development.

5. Children's gymnastics: Children's gymnastics can exercise children's whole body muscle strength, coordination and flexibility, and at the same time it can promote children's physical development.

6. Running: Running is an aerobic exercise, which can exercise children's cardiopulmonary function, improve physical endurance and enhance lower limb muscle strength.

7. Team sports such as playing football and basketball: These sports can cultivate children's team spirit, improve communication skills and exercise physical fitness.

8. Dance: Dance can improve children's flexibility, coordination and mobility, and has a good role in promoting children's physical development.

In short, children's fitness exercise should pay attention to fun, safety and comprehensiveness to promote the healthy development of children's body and mind.