###Human: Is 20% bone union after a fracture enough in a kid? ###Assistant: Hello. The reduction is not appropriate in this case, the bone might join in a 4-year-old child but this is certainly taking a risk. The child requires removal of the cast, reattempt at the closed reduction, application of slab for one week followed by checking of X-ray elbow with the forearm with wrist-anteroposterior and lateral view to confirm reduction is maintained or not. If the reduction is maintained, then to undergo cast immobilization. Children do not require sling at all times. Role of the sling is to prevent edema of the limb by keeping it elevated and gives support. The child can play with well-fitted cast provided there is no fall on the limb, the cast is not soft and broken. If there is anything else, feel free to discuss further.