Little kids get their own play areas and toys. You get to ride a section of the Oregon Trail with camping gear pulled in a horse-drawn chuckwagon. Write for a catalog. If your parents are driving through Idaho Falls and need to stop for a bunch of groceries, ask them to shop at Fred Meyer. It's got a supervised little-kid play area where you can drop off your irritating baby brother.
Fish hatcheries are great places to learn more about trout.
Some hatcheries also have feeding ponds where you can purchase a handful of fish food and attract trout as long as your arm. In Yellowstone National Park, fishing permits are required for children older than 11. You get to ride a section of the Oregon Trail with camping gear pulled in a horse-drawn chuckwagon. Write for a catalog.