Pick Your Brain
This devious puzzle is designed to look just like an old-fashioned, sturdy metal padlock, but woe to the poor innocent who tries to open it like one. Turn the key...and nothing happens. Nothing ever will happen, because it's a trick lock. The real "key" is a mental one: the solution to the trick, which you have to figure out.
Puzzle locks have been around for centuries, foiling burglary attempts, keeping secrets, and helping escapologists (yep, a real word: we checked) baffle audiences. Feel like The Great Houdini, picking your own lock while honing fine motor skills, logic, and critical and imaginative thinking. Made in China.