Wacky Cake ala construction zone

This is my cake that never goes wrong. I first made it when I was about 12 years old and it's been a success for birthday parties ever since. If you've never had this cake before, let me tell you it is super easy, super moist and super delicious. My friend Debbie says that she looks forward to my kids birthdays and having this cake. It is great served with vanilla ice cream for a treat too.

1 1/2 cups flour
1 cup sugar
4 tbsp cocoa
1 tsp baking powder
1 tsp baking soda
1/2 tsp salt
1 tbsp vinegar
1 cup lukewarm water
5 tbsp cooking oil (I use canola)

Pre-heat oven to 350*. Mix dry ingredients in a large bowl. Make 3 wells in the dry ingredients. To one well add the vinegar, to another the water and to the third the cooking oil. Mix well.
Spray an 8x10 cake pan with non-stick cooking spray. Turn batter into the cooking pan. Bake for 30-35 minutes (until a toothpick inserted comes out clean).

To make the cake into a construction zone as seen above, spread chocolate icing on the cake. Sprinkle Oreo crumbs all over. Dig out a hole in part of the cake. Stick on construction mini cars, cones and signs. Add some of the dug out cake into the dump truck and the diggers. My son and his friends loved this.