Good luck debugging it Andy. Good luck finding the child free time too.

How old is the child? Once they are old enough to read the letters 'R' and 'C', and numbers 1-20 or so, you can use them to populate the circuit boards for you.

(And once they are old enough to hold a pencil, and understand the sentence "Arrrhhgg, no, that's too much solder!" they are ready to learn soldering too )