Spray two 8 inch cake pans with cooking spray. Set aside.

Divide the butter between two saucepans and place them over medium heat until the butter is melted.

Add half the marshmallows to each pan and cook, stirring frequently, until the marshmallows are melted.

Stir half the vanilla into each pot. Place a few drops of blue food coloring in one pan and mix well. Leave the other pan white.

Remove the pans from the heat and stir 3 cups of Rice Krispies into each pan until well combined.

Spray your hands with cooking spray and dump half the blue mixture into each prepared cake pan. Working quickly press the blue into the edges of the pan forming a 1 to 1 1/2 inch wide ring around the edge.

Use the plain mixture to fill in the center of both pans. Pack it in tightly.

Allow to cool for 20-30 minutes then flip both pans onto a cutting board and cut into quarters. You will have 8 pieces total.

Put the white candy melts in a microve safe bowl and microwave in 20 second intervals, stirring in between each heating, until melted.

Place the white candy in a zip top bag and snip off the corner. Pipe a white mouth onto each treat and let harden 15 minutes.

Put the red candy melts in a microve safe bowl and microwave in 20 second intervals, stirring in between each heating, until melted.

Place red melts in a zip top bag and snip off the corner. Pipe on a zigzag for teeth. Let harden 15 minutes.

Press a chocolate chip into each treat for the sharks eye.