Watermelon cake

I went to a potluck cookout yesterday. My contribution was this nifty watermelon cake.

Ingredients in the cake:

• One box of white cake mix, plus the water/eggs/oil it calls for
• One packet of watermelon jello (thanks, Ma!)
  
• Chocolate chips (less than a cup; a little goes a long way; **see below)
• Red food coloring
  

Mix all the ingredients together and bake as directed.

To frost:
Reserve half the frosting for the outer green ring and color with green food coloring.
Color the other half with red food coloring and frost the center middle and center top.
Make sure the cake is thoroughly chilled before you frost. Use room-temp frosting.
I did mine in two phases: chill thoroughly; pink first; chill thoroughly again; green later.
Add a few chocolate chips on top.

One of the ladies commented, "That is so clever. Do you have kids? If not, you should!"
"No. I get that a lot," I replied, "mostly from my mother."

**When I made it, I used almost an entire bag of mini chocolate chips in the batter. The cross-section turned out a bit "saturated" instead of "speckled". In retrospect, I should have used fewer than half that much, and I should have used the regular size chips.

Nobody cared, though. It was a huge hit at the cookout.