Top 10 Best I Spy Books Ages 4-6

I Spy Animals

I Spy a Dinosaur's Eye (Scholastic Reader, Level 1)

I Spy Treasure Hunt: A Book of Picture Riddles

I Spy With My Little Eye Construction Vehicles: I Spy Book For Kids Ages 2-5, Toddlers and Preschoolers, Fun Picture Puzzle Game with Trucks, Excavators, Diggers and more

I Spy: A Book of Picture Riddles

I Spy with My Little Eye Christmas Search & Find (Sleeping Bear Press Sports & Hobbies)

I Spy Letters

I Spy Spooky Night: A Book of Picture Riddles

I Spy a Candy Cane (Scholastic Reader, Level 1)

I Spy A to Z: A Book of Picture Riddles