These bubble frames when dipped in bubble solution show some neat bubble shapes. When double dipped some of these can produce bubbles within bubbles.
Inspired by a family trip to the Magic House.
I got the best results printing these with both a raft and support.
The stl files I printed on my Replicator 2, you may need to resize using the customizer based on your machine's printable area.
I got valuable information, including a bubble solution recipe, from the websites of Mike Mongan and David A. Katz.