WCS would be the better choice with the 3yo in the house. People who visit can shoot for goals and feel like they accomplished something and would increase others interests more. This WILL be your first, and would be great in your lineup until you need more space. BSD is too dark for the 3yo, and will be harder game. WCS is great to have around every 2 years when the men's and women's World Cups are played too. It's like having I500 every Memorial Day weekend! Haha!