Place the light blue candy melts in a microwave safe bowl. Heat in 30-second intervals, stirring in between, until smooth. Next, take a bowl with a nicely rounded bottom and use your fingers or a spatula to spread the melted blue candy in a wave-like shape along the bottom curve of the bowl and up the side. The shape and texture should mimic a wave. Refrigerate until the candy has set (about 10 minutes).

Once set, melt about 1/4 cup of the white candy melts. Spread over the inside and outside of the blue wave, leaving some of the blue still showing. Refrigerate until needed.

Melt the chocolate candy melts. Dip pretzel sticks into the chocolate, then place on the parchment paper to set. For the palm leaves, drizzle melted green candy melts back and forth on wax paper. Let them harden completely before moving them. Once set, use extra chocolate to attached them to the pretzels.

Melt the remaining white candy melts and separate into 3-4 different bowls. Use gel food coloring to make a few different colors, then pour into the seashell molds and let set. You can also find candy seashells online if you're looking for a shortcut.

Bake cakes according to the package directions. You'll need 4 boxes of cake mix because each 9×13 pan takes two. Once baked, allow the cakes to cool completely.

Use a cake leveler to level the cakes so that they are both flat on top. Cover the top of one cake with white frosting, then place the second cake on top of it.

Frost half of the cake with white frosting.

Mix blue food coloring with remaining white frosting until you get a pretty ocean blue color. Spread it over a little more than half of the cake, creating swirls of waves. Swirl it together slightly with the white frosting where the blue and white meet.

For the sandy shore, sprinkle crushed graham crackers over the white frosting, stopping along the "shoreline".

Adding the wave to this Moana cake can be a little tricky. What I found worked best was to make a slit with a knife, about the width of the wave. Dip the bottom part of the wave in melted candy to help it stay in place, then push the wave down into the slit. This should keep the wave nice and sturdy without any wobbling, but if it's still a little wobbly, you may want to push it deeper!

Pipe some of the blue frosting around the bottom edge of the ocean area of the cake.

Add the candy shells around the cake. Make sure to push firmly to any on the side of the cake, so that they stay attached with the icing.

Add some candy flowers to the sandy area on top of the cake.

Finish your masterpiece by adding Moana, Pua and any other characters you like, with the palm trees in the background