Toy Story and Toy Story 2 are some of the best stories that Pixar and Disney have ever made. While I'm not a big fan of the movies myself I found them absolutely breathtaking in 3D. While it wasn't the "3D experience" I had as a child where everything popped out and tried to hit me in the face it was still amazing. Disney and Pixar always out do themselves and I found the little break in the middle of the two to be as amusing as the movies themselves.
I'd recommend that both children and adults go and see these while they can. Especially if either is a big fan of Toy Story.