reflecting and learning, but I digress....)
"Pumping ____ into _____" would be a good starting point in thinking about inflation as an economic phenomenon.
In addition, I know this was made for kids, but it can be a useful tool to help understand what causes inflation (monetary)
https://www.angel.com/watch/tuttle-twins/episode/5daf8a13-4532-4fbf-a89f-e37d544c0ec0/season-1/episode-6/the-inflation-monster
Here's a short segment that explains it