Pizza Party

From BoardGameGeek:

Pizza Party is a quick and simple variation of Memory for children which becomes much more adult and exciting when money is wagered on the outcome. Each player gets a color-coded pizza slice with six slots used to hold topping discs. There are six discs of four different toppings placed face down on the table along with two "switch" ones for each color. Players flip one over on their turn and add it to their slice if it matches the topping they already have. If a "switch" one is revealed, the player trades his or her slice with the player of the corresponding color or with any player if his or her own color is revealed. Ages 4 to 8