A DIY jelly beans dispenser will be made of wood and will not require coins to operate. You will need make the parts that will then need to be assembled. Scrap wood will be perfect to use depending on the pieces of wood you have available.
You may want to have your DIY jelly beans dispenser provide more than one jelly bean at a time. This is something that you can easily change if you want to customize the design. All of the jelly beans will be stored in a mason jar that is really easy to refill