The board
A 7 by 8.75 inch card sealed under a vacuum-formed bubble. The powder stays inside whichever way a kid shakes it, which is the whole reason this toy survives car seats and waiting rooms.

This is the box you find in a toy aisle today. The board inside has not changed: Willy's bald face printed on card, magnetite powder resting at the bottom edge, a clear bubble sealed over the top and a magnetic wand to drag the powder around. PlayMonster has run the line since 2016 and left the toy itself alone.
Checked when these pages were last rebuilt; the listing itself has today’s number.
A 7 by 8.75 inch card sealed under a vacuum-formed bubble. The powder stays inside whichever way a kid shakes it, which is the whole reason this toy survives car seats and waiting rooms.
A small magnet on a red stick. Hold it against the bubble and the powder climbs toward it; drag slowly and you get a line, tap and you get a tuft of hair.
Lay the board flat to draw. When the face has had enough, tilt the frame and the shavings slide back down to the bottom, ready for the next mustache.
The box says ages 4 and up, and that is about right. Three-year-olds can move powder around; the fine-line beards start landing at five or six.
Same board inside every one of them; the differences are packaging and cost.

The same full-size board on a plainer listing, and usually the lowest cost of the standard boxes.

An older box from the Patch Products years, the same toy wearing the packaging it had before 2016.

The newest listing on the shelf, pitched at road trips, party bags and the bottom of a stocking.