The World's Biggest Book of Brainteasers & Logic Puzzles
$7.09 - $8.49
Super Sensational Science Fair Projects
$6.39 - $11.69
Hsp Science Grade 3
$4.79 - $5.69
Classic Optical Illusions
$4.89 - $5.79
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 - $5.59
Optical Illusion Magic: Visual Tricks & Amusements
$5.19 - $9.19
Science (Grasshopper) Level 6
$9.99 - $10.49
Optical Illusion Experiments
$6.89 - $7.89
Awesome Experiments in Electricity & Magnetism (Awesome Experiments)
$7.49 - $8.89
Giant Book of Mensa Critical Thinking Puzzles
$5.09
Awesome Experiments in Force & Motion (Awesome Experiments in)
$7.39
HSP Science
$8.89
Visual Thinking Puzzles
$4.49
Harcourt Science Grade 1 California Edition
$5.69 - $6.69
Giant book of challenging thinking puzzles
$5.19 - $6.59
Hsp Science Grade 2
$6.49 - $6.79
Giant Book of Optical Puzzles
$5.39
California Science Grade 2
$10.59
The Ultimate Clever Puzzle Book
$10.39
Addison And Wesley Science Insights: Exploring Matter And Energy
$15.19 - $16.09
Eye-Popping Optical Illusions
$7.39 - $15.89
California Science
$6.79 - $7.99
No-Sweat Science: Optical Illusion Experiments (No-Sweat Science)
$6.09
Florida Edition Science Grade 5
$38.69 - $43.29
Classic Critical Thinking Puzzles
$5.09
Exploring Living Things (Science Insights)
$6.09 - $7.39
Mensa Visual Tricks
$5.69