Brain Teaser Cards” are how this item is described by the manufacturer.
“Contains an Optical Illusion Trick plus Directions for 4 other Puzzles. They’re
harder to solve than you’d think! Solutions included.”
This item is a well made reproduction of a classic puzzle. The
illustrations are well done and amusing.
“A mechanical puzzle is a self-contained object, composed
of one or more parts, which involves a problem for one person to solve by manipulation
using logic, reasoning, insight, luck, and/or dexterity.” - Jerry Slocum