Wood Swing Set Blueprints For All You Parents Out There, Do You Think Metal Swing Sets Or Wood Swing Sets Are Better For Children.?

For all you parents out there, do you think metal swing sets or wood swing sets are better for children.? - wood swing set blueprints

I have three daughters and I ask myself whether I want to buy on a swing made of wood or metal. There is a better than others? My children are 1, 5 and 6