I think this will be just perfect for rasberries. Plus you can mow around it so they don't get out of control in your yard. & easy access to the berries. Now where to plant them...?
How to grow Raspberries and Blackberries when to prune/transplant/fertilize! e.g.: "Raspberries use a lot of water, especially when bearing. About 1 1/2 inch of water per week and more during hot weather. Watering is most critical from the time the fruit begin to show color until picking has been completed."
A Giant Checkerboard
Put a few checker games this these on the play ground