1v (icosohedron) Dome Corner Connector

myminifactory

If you print 11 of these and use 25 pieces of 1/4" diameter wood dowels, all the same length, you can assemble all that into what the geodesic dome nerds call a 1v dome. If you use 4' long dowel (the length you usually find at the hardware store) you will end up with an approximately 5' tall dome. Throw a blanket over that and you've got a pretty awesome fort for the kiddos.