My Brian, age 11, used to love Thomas the Tank Engine at age 5, but his oddest obsession as a preschooler was streetlights. He knew exactly where the different types were, which ones were burned out, and could discuss the light-sensing timers that they used. Now he is very interested in rocks & minerals, Star Wars, and coins. He is afraid of motorcycles and trucks, anything that makes a loud noise. Interesting how similar the obsessions & fears are. Debbie