
The World's Biggest Book of Brainteasers & Logic Puzzles
$7.79 - $8.89

The Ultimate Lateral & Critical Thinking Puzzle Book: Master Your "Thinking-Outside-The-Box" Skills (Puzzle Books)
$9.69

Hsp Science Grade 3
$10.89

Awesome Experiments in Electricity & Magnetism (Awesome Experiments)
$7.79 - $10.59

Florida Edition Science Grade 5
$5.89 - $7.09

Critical Thinking Puzzles
$4.39

Great Critical Thinking Puzzles
$6.89 - $7.09

Classic Optical Illusions
$6.39

Awesome Experiments in Force & Motion (Awesome Experiments in)
$6.69

Super Sensational Science Fair Projects
$5.49 - $6.39

Hsp Science Grade 1
$16.79

Exploring Earth and Space (Science Insights)
$5.99 - $13.79

Giant Book of Mensa Critical Thinking Puzzles
$6.29

Optical Illusions: Challenge Your Visual Thinking!
$5.79

Hsp Science Grade 2
$9.49

Challenging Critical Thinking Puzzles
$5.89

Eye-Popping Optical Illusions
$9.29 - $9.69

California Science
$5.89 - $6.79

Optical Illusion Magic: Visual Tricks & Amusements
$6.59 - $11.19

Your 21st Century Brain: Amazing Science Games to Play With Your Mind
$9.29

Science (Grasshopper) Level 6
$10.39 - $10.89

Giant Book of Optical Puzzles
$5.29 - $5.59

California Science Grade 2
$9.69

Awesome Experiments in Light & Sound (Awesome Experiments in)
$11.89

Addison And Wesley Science Insights: Exploring Matter And Energy
$6.69 - $12.99

Harcourt Science Grade 1 California Edition
$9.49

Giant book of challenging thinking puzzles
$6.39 - $10.49

Classic Critical Thinking Puzzles
$4.69

Space Mania: Discovering Distant Worlds Without Leaving Your Own
$9.59

Puzzles for a Super-Mind Workout
$6.49