Here's an interesting little gadget. I've noticed these before, they're designed to look like a cassette tape (curiously there seems to be numerous gadgets designed like a cassette). Anyway this article was published yesterday and provided a link to it on Amazon... Which shows it out of stock! Anyway, I'm not interested in getting one, but did take a look around just to see what they go for, the cheapest of which appears to be eBay for about $30. Also noticed YouTube videos but didn't watch any of them, still it is very unique and interesting gadget. It's called a Syth-a-Sette
This Innovative Gadget On Amazon Turns Everyday Objects Into Music https://www.bgr.com/2108732/amazon-innovative-gadget-objects-into-music/
".... The all-analog design means there are no microprocessors to mess with and no code that needs to be uploaded to get yourself up and running. Simply pop in two AAA batteries, and you can start making music. The included audio jack also means you can do so quietly while on the go. While the Syth-a-Sette is a fun little music maker, it has one feature that makes it truly special and unique for performers and tinkerers alike.
. .... ... The opportunities to get an audience involved by using a Synth-a-Sette are fantastic. .....
Read More: https://www.bgr.com/2108732/amazon-innovative-gadget-objects-into-music/