National Geographic Kids Quiz Whiz: 1000 Super Fun, Mind-Bending, Totally Awesome Trivia Questions

National Geographic Kids Quiz Whiz: 1,000 Super Fun, Mind-bending, Totally Awesome Trivia Questions

Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love (Thinking Books for Kids)

Trivia for Smart Kids: Over 300 Questions About Animals, Bugs, Nature, Space, Math, Movies and So Much More