If your kid’s room was the movie Toy Story, which toys would be the stars?
At my house (3 sons, 12, 10, 5) the big winner is definitely Legos. Before Legos it was Thomas the Tank Engine.
Also there is one tiny little plastic dog that cost 25 cents in a vending machine that holds a huge place in my youngest’s heart.
The Firebug is 4 years old. Here are his favorites:
She’s such a girly girl.
Well, Buzz and Woody for two. 
(A 2nd or 3rd gen Buzz that came with a small Mr. Potato-Head and some green soldiers, and a Woody from the same set that came with swappable hats including a US cavalry hat and a WWII helmet with general’s stars).
Those plus 3 stuffed toys (a bear, a small dog, and a cat) have proved the most “durable” of Alex’s toys.
He’s 10 now and computer games and Nerf guns figure more than other toys, but those 5 toys still have special status.
My daughter is 3 and loves building things.
8yo daughter:
Legos, Legos, Legos, and Star Wars action figures.
11yo daughter:
These days mostly craft supplies.
My son’s favorite toys are his costumes (Optimus Prime has gained favor over pirates) and his trains.
My daughter’s favorites are a little harder to tell. She’s only 2 and just getting into actual toys. Her favorites change from her brother’s old dinosaurs, a leaptop and her brother’s trains (he has old ones he lets her play with). She sometimes likes dolls, but overall her favorite playtime activity is to push me over and roll around on my head.
Lego
Army Men
Playmobil stuff
wood blocks
Stuffed animals
Flashlights
Blankets
Wooden train set
Legos
wooden blocks
Matchbox cars
random crap picked up from the park, golf balls, seed pods, leaves, rocks, etc