Cut each sheet of puff pastry into 12 squares for a total of 24 squares.On half (12) of those squares, put some brie cheese in the middle.Spoon jam on top of the brie cheese.If using cake or popsicle sticks, place one end of the stick in the middle of the cheese mixture now.Use remaining 12 puff pastry squares to enclose the cheese and jam, pressing down slightly around the edges to seal.Cook at 375 degrees Fahrenheit for 13 to 15 minutes, or until slightly brown. Serve warm.