Greetings from my shed...
Oh my! I'm thrilled to have inspired some awe in your household. You made me laugh aloud. That's a brilliant photo you made.
Here's one I used to torment my children with. I call it my 65 cent challenge. The long video describes the coinage so you can find equivalent coins. https://youtu.be/r1nfONM74HU
This shorter video gets to the point. https://youtu.be/zMeneGYCxwg