It is a dessert made of white chocolate puzzle pieces. When the puzzle pieces are fit together, they form a Disney character (usually, Mickey). It comes with some edible "paints" that the kids can use to paint the puzzle pieces. It usually also comes with a cupcake (and that is what ends up getting eaten; once painted, the kids seem to lose interest in eating the actual dessert).
We have had it at Artist Point and Captain's Grille.