I always wanted to build a coin-operated candy machine for my kids. Can you give me some ideas?

 

What is your skill set with building mechanical things?
What is your skill set with building electrical/electronic things?
Do you want to build the coin mechanism from scratch, or buy one?

ak

 

Do you want it to simply accept any metal disk or to be able to reject fakes and distinguish different coins.
The first is very easy, the second is very hard.