I managed to get one from Adafruit last week. They restock ~weekly, typically Wednesdays, and sell out within a few minutes of the notification going out.
The official suppliers are required to sell at MSRP. People buy and then resell at higher prices so you can usually find them on amazon and eBay for double or more the MSRP.
The microscope story a sibling comment mentioned is part of a 1970 letter from a then-NASA Director to a nun serving in Africa who asked the same question. I believe the full text is worth a read:
http://www.lettersofnote.com/2012/08/why-explore-space.html
I think these were probably water balloons. The idea is that all of those straws are connected to a single garden hose fill adaptor, so the whole bunch of balloons can be filled at once. (example: https://www.aliexpress.com/item/33011481532.html)
I abhor the single-use plastic, but at the same time water balloons are just fun in the summer. If paintballs can be made biodegradable (they're gelatin), maybe there's hope for water balloons, too.
You may be interested in a recent episode of the 99 Percent Invisible podcast (https://99percentinvisible.org/episode/atomic-tattoos/). The title of the podcast comes from a Cold War program carried out in 1952 in which students could opt to receive a small tattoo of their blood type, with the goal of creating a "walking blood bank" in the event of a disaster requiring mass transfusions.
Related to your question, the episode also explores the history of "duck and cover." It turns out it's there is some credibility to the technique. In September 1945, the US sent a team called the Atomic Bomb Casualty Commission to Japan to research and interview survivors of nuclear blasts. They located survivors just a few blocks from the explosion epicenter, who had been sheltered by concrete basements. They also heard stories of people who were killed just by shattering windows and falling debris. With just some ability to shelter, survivability might be higher than you suspect.
We had a recent example of the value of "duck and cover" - and more specifically what happens if you don't do it - the Chelyabinsk meteor.
"Its explosion created panic among local residents, and about 1,500 people were injured seriously enough to seek medical treatment. All of the injuries were due to indirect effects rather than the meteor itself, mainly from broken glass from windows that were blown in when the shock wave arrived, minutes after the superbolide's flash."
Many of the injured went to a window to see the spectacle in the sky, not realizing that the shock wave was about to shatter the window in their face.
And from that article, there's even a way to compare the effects of duck & cover:
"A fourth-grade teacher in Chelyabinsk, Yulia Karbysheva, was hailed as a hero after saving 44 children from imploding window glass cuts. Despite not knowing the origin of the intense flash of light, Karbysheva thought it prudent to take precautionary measures by ordering her students to stay away from the room's windows and to perform a duck and cover maneuver and then to leave a building. Karbysheva, who remained standing, was seriously lacerated when the blast arrived and window glass severed a tendon in one of her arms and left thigh; none of her students, whom she ordered to hide under their desks, suffered cuts."
>Many of the injured went to a window to see the spectacle in the sky, not realizing that the shock wave was about to shatter the window in their face.
That's really interesting, for itself and other reasons. The US sending a commission into Japan (in '45!) for the sole purpose of studying survivability related to atomic blasts seems sort of mind-blowing to me.
Back in elementary school, we practiced duck-and-cover not as a defense against nuclear war (although we were only a couple of kilotons from the DoE Pantex plant), but against tornadoes. They're not entirely different, effectwise.
I believe my submission on this is hidden because of my recent registration here. I've lurked for a long time.
The press release[1] from Staples confirms ordering online is live now, and printers will be on shelves in select stores next month.
I would have thought FedEx/Kinko's would be the first to make a move on 3D technology, first as in in-store service, then stocking product.
There was also previous discussion[2] on 3D systems and their aggression toward other upstarts. Smart of them to be first into a major national retailer if they cannot compete in the 'enthusiast' space.
