The Hagemann Ranch Trout Farm is a great place to take your kids fishing and teach them how it is done. They have two fairly large ponds that are stocked with trout. You'll catch something for sure.
The trout farm has everything you will need. They rent out poles and have a good bait selection for sale.
Where To Fish
Trout like cold water. You'll either have to fish very deep for them or ... fish in the shaded spots. Good luck!
Fishing with kids can be difficult. Line can sometimes get all tangled up and other things. If something goes wrong with one of your fishing poles, just take it back up to the store and grab another one.
The people out there are really friendly and they do what it takes to help you have a good time.
Last Bit of Advice
Here's an idea. They have picnic tables and grills there. Once you catch your "limit", have the ranch clean them for you. Then take the fish over to the grills. Wrap them in aluminium foil with some garlic, salt, pepper, and olive oil. You'll have to bring all of your own grilling supplies. The kids will really enjoy eating what they just caught.