This app was mentioned in 5 comments, with an average of 1.60 upvotes
I'll just leave this here:
https://play.google.com/store/apps/details?id=com.circuitjam
https://play.google.com/store/apps/details?id=com.circuitjam Circuit Jam - learn electronic circuits by solving circuit puzzles.
Have fun, you've got this. :)