When our kids were young, I would read them this Curious George Goes to a Chocolate Factory book. I found out Utah has a chocolate factory that gives tours, and we walked in and felt sentimental when we saw this book.
The tour was really fun, and they gave us samples of their chocolates all during the tour. They showed us different videos, let us watch a worker dipping chocolate on the other side of the glass, and took us upstairs to get a good view of the factory and see an old machine.
We've been to Utah for so many years and done so many things there, but this was new and different and I highly recommend it. We brought my mom along because she loves and appreciates chocolate, and we all had fun.