The main items you will need are the coins, I used the coins of my country. Any size would be good, but the bigger the better. Cardboard is also important in this project, almost everything is made using 3mm cardboard. For the sound I used an old 128mb MP3 player. A servo hacked for continuous rotation. If you buy a new servo, it will probably come with a few handles, I you use a old servo you will have to make your own handle. Two springs, one to push the coins up, and another to push the coins into the charger. A small piece of a thin plastic, like the kind used in credit cards. Electronic stuff is detailed in step 10.