Problem: Then focuses back onto the children in the sand that are continuing to dig into the sand and pile sand into a big pile. one of the girls

Answer: then runs out of the shot and the other girl and the only boy remain near their small pile of sand.

Problem: A man is playing a set of bagpipes on a stage. he

Answer: walks back and forth while people dance to the music.

Problem: How to train a horse to jump
Make sure you have the required items.
You'll need cavaletti poles, jump standards, boots to protect your horse's pasterns, and a suitable saddle for jumping. If you don't have a cavaletti just use wood poles or tree branches.
Answer: Use heavier weight poles (not pvc pipes or bamboo) so if your horse hits one of the poles he will realize that hitting them is uncomfortable. Set the cavaletti poles on the ground.