Roaring Camp Railroads runs steam trains from Felton into the redwoods, and it is touristy in the right way. The ride is slow, noisy, and atmospheric, with the smell of oil and wood smoke adding more to the experience than any narration could.
Check the schedule before building a day around it, especially outside summer and holiday periods. Families will get the most from it, but anyone with a weakness for old railways should make time.