The leopard crawl is a military type-specific crawl that can increase shoulder strength by using the shoulder muscles to move forward.
Place an empty bucket at one side of the room and give the child a few small size balls (tennis balls, ping pong balls, cotton balls, etc.).
Ask the child to hold one ball in each hand while on his tummy and do a leopard crawl towards the empty bucket. The route to the bucket can go under a table, inside a tunnel, under chairs, or other obstacles for grading.
When the child reaches the bucket, ask the child to put the balls in it and crawl back to the start.
For proper crawl ensure the child is advancing an arm/elbow with the diagonal knee. When an elbow is placed forward, the diagonal knee is also placed forward, and then alternated with the other elbow and knee.