This is a nice and colorful routine for Kid show performers, with easy to carry pack flat props.
Attractively screened on Art Board, you get everything you need, with detailed instructions.

EFFECT
The performer displays a window envelope, with the picture of a Rabbit in an outline Top Hat,
which has no color. The spectators are invited to select a color for the Top Hat from a chart of
different shades. When the picture is again displayed, the Top Hat has magically colored into 
the selected color.  And the selected Hat outline from the chart has been magically replaced
by a colorless outline.

These are two clever props, blended into a nice routine. You could of course color the hat without
using the card, just ask the kids to call out their favorite color ! And you could use the card to force
a color for any effect. .