How long it takes for a child to be able to bounce on a fractured thigh depends on a combination of factors such as the degree of the specific fracture and the healing process. Each person has certain individual differences, there is no uniform time, it may take about 3 months or more, the specific time should follow the doctor’s advice. 1. Degree of fracture: If a child’s thigh fracture is a stable fracture, it can be treated conservatively through plaster fixation, and can walk and jump in about 3 months; if the fracture degree is more serious and belongs to an open fracture, it needs to be fixed by surgery, and it usually takes 3 to 4 months to jump in a small range. 2. Healing: If a child’s thigh fracture heals well, he can usually jump in about 3 months; if the healing is poor, and there are symptoms such as poor healing and displacement of the fracture site, it may take 3 to 6 months before he can jump. If you encounter any of the above problems and have any questions, it is advisable to consult a specialized orthopaedic surgeon and have regular check-ups.