“What is this bubbling out of the ground in my yard? Purplish metallic gooey inside.”
Answer: “Carpenter here, that looks all the world to me like expanding foam. The manufacturers like to color them for brand recognition or purpose identification. All the signs are there. The even coloration, the outer skin that formed, and the familiar random expansion pattern.”
It's a bread bow
Flash CUBES, not bulbs - for Instamatic cameras. We used to make a gadget out of a paper clip to set 'em off in your hand.
Useful for magic acts.