Combining the two ideas you can make a pizza "crust" from the Rice krispie treats, substitute sauce with melted milk chocolate, top with a variety of goodies (marshmallows, M&Ms, nuts etc) and then sprinkle with shaved white chocolate. To get more creative, serve in a small pizza box (buy a few from the local pizza place)
We used to sell these at Craft fairs:
Chocolate dipped strawberries $1 each.

(dip in white first and make a Tux & tie from milk chocolate and you can charge up to $3

)
Candy cane bark (crushed candy canes spinkled on a sheet of melted white chocolate)