The World's Biggest Book of Brainteasers & Logic Puzzles
$7.09 - $8.49
Science fusion Grade 4
$4.69
Super Sensational Science Fair Projects
$6.39 - $11.59
Hsp Science Grade 3
$4.61 - $5.99
Optical Illusions: Challenge Your Visual Thinking!
$4.89
The Ultimate Lateral & Critical Thinking Puzzle Book: Master Your "Thinking-Outside-The-Box" Skills (Puzzle Books)
$5.09 - $5.79
Critical Thinking Puzzles
$3.99 - $5.69
Great Critical Thinking Puzzles
$4.69 - $8.09
Classic Optical Illusions
$4.49
Optical Illusion Magic: Visual Tricks & Amusements
$5.09 - $9.19
Optical Illusion Experiments
$6.89 - $7.89
Awesome Experiments in Electricity & Magnetism (Awesome Experiments)
$8.89 - $9.29
Science (Grasshopper) Level 6
$9.29 - $9.79
Giant Book of Mensa Critical Thinking Puzzles
$5.09
HSP Science
$8.89
Visual Thinking Puzzles
$4.99
Harcourt Science Grade 1 California Edition
$5.69 - $6.69
Giant book of challenging thinking puzzles
$5.29 - $6.29
Hsp Science Grade 2
$8.19
Giant Book of Optical Puzzles
$5.39
California Science Grade 2
$9.49
The Ultimate Clever Puzzle Book
$9.99
Addison And Wesley Science Insights: Exploring Matter And Energy
$9.29 - $16.09
Eye-Popping Optical Illusions
$7.39 - $15.89
Florida Edition Science Grade 5
$38.69 - $43.29
Puzzles for a Super-Mind Workout
$5.19 - $5.79
Challenging Critical Thinking Puzzles
$5.39 - $6.39
Exploring Living Things (Science Insights)
$7.39 - $12.89
Awesome Experiments in Light & Sound (Awesome Experiments in)
$5.49 - $7.39
California Science
$4.99 - $5.89