Draw the inside of the tomato's eyes with the black paint marker. Cut the hook off of the wire hanger with wire cutters. Push it down through the top of the tomato so it will stick in the ground. Play the game by taking turns hitting your ball through a maze of veggie characters. You can also use regular cardboard and paint it if you can't get corrugated plastic, but it won't be as durable.
Corrugated plastic is made by several manufacturers.
It is known as Stratocore or Coreplast, along with other names. I found that if I purchased it from a signage store it was cheaper as long as I was going to make several projects out of it. Otherwise, open it.