Where Are The Subliminal Messages?

Milo and I watched Toy Story for the first time today. He loved it, laughing out loud and, at the end, telling me how much he enjoyed watching it. Many hours later, we were talking and Milo blurts out with, "Mommy, I really want a space man like Buzz Lightyear. Can I have one, please?" How does Disney do it? How do they program the subliminal messages such that they are only geared to the preschool set? I don't know, and I don't like it, but it's genius.