Here's a magnet ball and tunnel system. I picked up a sheet of metal and used base board frames to create the border. The tubes are made of clear ketchup dispensers and fastened together with electric tape. I fastened the magnets to the back and lined the tubes up in various ways to create a fun and interactive play.
I call this tunnel system tulips and tunnels. We combined the clear ketchup bottles with PVC pipes and connectors. The tunnels are attached with grey plastic electrical fasteners. The tulips are attached with velcro so the kids can pick flowers