All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
Islam gave importance to the health and strength of the body and encouraged the practice of mental and physical sport provided that the Islamic conditions are met.
We are not aware of the sport that you mentioned, but if it is free from Islamic prohibitions, such as exposing the ‘Awrah (what should be covered of the body) before someone whom it is forbidden to expose it to or forbidden mixing between men and women and the like, then there is nothing wrong in it for both women and men, let alone children.
Allah knows best.