I like this so much better than ties. Could use toggle buttons strung on cord sewn into the seams of the seat cushion construction.
One old skateboard, some rope and a broom stick (and a tree) and the kids can have a great swing. Are we ever too old to have a swing?
Build Treehouse - Children's Outdoor Plans and Projects | WoodArchivist.com
ikea bodbyn - Victoria, this is the cabinet style I thought you might like at IKEA. I think those might be the handles too. They may be a little more plain than those.