This YouTube video demonstrates a pressure fountain with a balloon. It could be done as an at home experiment.
https://scienceexplorers.com/how-to-teach-kids-about-air-pressure/ -This link takes you to a page that explains air pressure for kids. This page uses good visuals and explanations.
This YouTube video explains the physics of pressure change in an easy to follow and visually appealing video.
https://www.dkfindout.com/us/science/forces-and-motion/pressure/ – This link takes you to a page that explains pressure to kids. It has many pictures and interactions.
