Are the rides generally "thrilling" for younger people?

Yes, any age.

It's Disney. Even the little rides are fun!

Yes, and if they are very young check out Toon Town. It is geared to the younger kids. However, even at my age I still love Gadget's Go Coaster. It is very fun. A bit short, but a huge thrill and I can even ride it with my 4 year old grandson. Other things that are great for younger kids include the Monsters Inc. ride and over at California Adventures don't miss Soar'n.

Yes, my 4yr old loves Big Thunder Mountain Railroad. There is a wide variety of "thrilling" rides for teenagers as well if that is what you meant by younger people. :-)

Yes, but they also have so smaller kiddie rides

Yes