This is a great book and great little recipe for a class or just for a childrens valentines day party at home. It is from Valentine School Parties . . . What Do I Do? by Wilhelminia Ripple You can get this book at Amazon for around $14

Toothpicks (one per child)
Assorted permanent markers
Pizza dough
(homemade or store-bought)
Pizza sauce
Mozzarella cheese
Pepperoni
Serving bowls
Serving spoons
Several baking sheets
Napkins
Optional:
Pizza toppings
Directions:

Color the tips of the toothpicks using permanent markers. These will be used to color code the children’s pizzas.
Form the dough into heart shapes.
Place the ingredients into the bowls with the spoons. Let the children create their own pizzas. Then have each child stick his toothpick in his pizza, color tip up.
Place the pizzas on the baking sheets, with no more than one of each colored toothpick per sheet. Give each baking sheet a number. Have the children remember which color they picked and which baking sheet number it’s on. This way the children are sure to get their own pizzas.
Bake at 400 degrees in the school’s kitchen oven until the dough is brown and the cheese has melted.
Cool slightly and serve on napkins.
Note: get permission to use the schools’ cafeteria.
Variation: Form the dough into heart shapes and pre-bake them before the party begins. Then let the children create their own pizzas. Broil pizzas in the oven until hot or the cheese has melted.