Mensa® for Kids: Everyday Super-Smart Mind Games: 100 Awesome Brain Teasers! (Mensa® Brilliant Brain Workouts)

Mensa® for Kids: Everyday Super-Smart Mind Games: 100 Awesome Brain Teasers! (Mensa® Brilliant Brain Workouts)

Mensa® for Kids: Fun Puzzle Challenges: Terrific Ways to Stretch Your Brain! (Mensa's Brilliant Brain Workouts)

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