In this mind-bending book, each puzzle is framed as a question that prompts young readers to look for or do something specific and even includes an explanation of how the illusion works, so kids won't be confused for too long.

"Content previously published in Optical illusions in 2012, Mind benders in 2013, and Color illusions in 2014"--Title page verso.

[Table of contents]. What is an illusion? -- 2-D or not 2-D? -- Learn your lines -- Sizing it up -- Moving pictures -- Do you see? -- Are you bright enough? -- Double take -- That's impossible -- Mind benders -- Think outside the box -- A-maze-ing paths -- Are you in the loop? -- Wordplay -- Seeing is believing -- Mad math -- Defying gravity -- Body benders -- Do try this at home -- Answers -- Color vision -- After images -- Color effects -- Color in context -- Why is color useful? -- Who's who? -- Now you see me ... -- Did you know? -- Colorless.