Everyone that enters needs a ticket. Their website does specify ages in which they do not need one though. I would check that first.
Everyone needs a ticket
Everyone making a candy bar needs a ticket
Each person will need their own ticket to make the candy bar. They use it through the process to keep track of your bar.
Everyone needs a ticket to enter Hershey Chocolate World, which is free. Parking is also free. All four can enter for free, but there's a cost to make your own candy bar ($26.95/each, but look into packages and adventure bundles like 4D movie, trolley for better value).
Need time entry to enter now. Doesnt matter what you are there for and will need extra tickets/combo package for make own candy bar.
The factory visit and the train ride is free, but activities and food you have to pay for. Activities are expensive. Specifically making your own candy bar experience is like $30 per person. They have packages for experiences+food at a little discount
Thanks! Your answer is awaiting moderation.