My DS is 3 years 1 month.
He likes:
Thomas Trains
Animal Planet plastic animals
Fisher Price LP animals
Large plastic animals from the Dollar Store
The cheapest plastic dinosaurs ever
Matchbox Cars
Anything that trains, animals and cars can be put into (boxes, buckets, jars, etc.)
Duplos
Magnets
Stickers
Fingerpaint
Playdough
Clay
Chalk
Sand toys
I'm lucky--his favorite toys EVER are completely free from the backyard including rocks, sticks, leaves, dirt, real bugs, puddles, flowers, etc.
Buzz Lightyear and Woody
The McDonald's HappyMeal "Cars" toys (he got from his Aunt)
Puzzles
Fun thread!
Jen