There is a small black coffin sitting by the till at the minute, and I have watched grown adults pick it up, shake it, put it down, and come back for it ten minutes later. Inside is a pen. That is all. A pen you cannot see until you have paid for it, which on paper sounds like a terrible way to sell stationery and in practice has been the fastest-moving thing in the shop since the schools went back.
It is the Legami Halloween blind box, and if you have a child, a teenager, or a colleague who collects erasable pens, you have probably already been asked about it. This is what it is, why it works, and how not to lose your head over it.
What a blind box actually is
A blind box is a sealed pack from a small, known set of designs. You know what the set contains; you don't know which one you're getting. Anyone who bought a lucky bag as a child, or ripped open a packet of football stickers hoping for the shiny, already understands it completely.
The modern version comes from Japan, where gashapon capsule machines have dispensed mystery toys since the 1960s, and from Sonny Angel, the little winged baby figures that became a quiet cult in the 2000s. Then Pop Mart, a Hong Kong-born company, turned it into a global business. Their Labubu character, a snaggle-toothed monster in a sealed box with a 1-in-72 chance of the "secret" colour, became the most talked-about toy of the last two years, hanging off designer handbags and clocking up over a million TikTok posts.
Every blind box series is built the same way. A handful of standard designs make up most of the run, and one rare design sits inside a small fraction of the boxes. That rare one, the "secret" or the "chase", is the whole engine. Nobody buys three boxes hoping for three of the same thing.
Stationery was always going to catch this. Erasable pens with animal faces already had a collector following of their own, so putting one in a sealed coffin was less a gamble than a matter of time.
What's in the coffin
The Spooky Party collection is three erasable gel pens, and every box holds exactly one of them. Two are the standard limited editions, a vampire panda in red ink and one in purple. The third is the Magic limited edition, a gold panda with black ink, and it turns up in roughly one box in twenty-five. That is the one people are chasing.
All three glow in the dark, which is a first for Legami's erasable range and is the detail that makes them properly Halloween rather than just pandas in fancy dress. Charge the barrel under a lamp for a minute, switch the light off, and there it is.
Underneath the novelty it is a normal Legami erasable pen, which matters. The ink is thermo-sensitive: rub it with the tip on the cap and the friction warms the ink until it goes clear, no rubber shavings and no torn paper. It takes the standard 0.7mm refill, so when the red runs out the pen carries on. I mention this because a lot of blind box toys are useless once the excitement wears off, and this one isn't. It will be in a pencil case in March doing homework.
The box itself is a proper little coffin, sealed, with nothing to peek through. That is the point. People will try to weigh them and shake them; I've done it myself. It doesn't help.
Why it gets under your skin
The honest answer is that a blind box is a very small, very cheap slot machine, and our brains are wired for exactly that. Psychologists call it variable reward: a prize that arrives unpredictably is far more compelling than the same prize delivered on schedule. It is why people check their phones and why a scratch card feels different from a receipt. Researchers looking at Pop Mart found around seven in ten buyers kept going back specifically to complete the set.
But there's a gentler side to it too, and it's the one I see across the counter. Opening a blind box is a moment. Children open them right there on the shop floor. Teenagers film it. Adults, who would never admit to wanting a glow-in-the-dark panda pen, buy "one for my niece" and then hover to see what she gets. A pen is a pen; a pen you had to earn from a coffin is a story.
The online chatter tells the same tale. Across TikTok the tags are #tiktokmademebuyit, #stationeryaddict, #unboxing and #legami, and the videos are almost all the same shape: fingers, a coffin, a pause, a reveal. People swap. People post their "pulls". Anyone who lands the gold Magic pen posts it like a lottery ticket, and by the look of the resale sites, it very nearly is; opened Magic pens are changing hands for many times what a box costs. One stationery shop owner in Cheshire, with twenty-one years in the trade, said she'd never been so excited to open a delivery.
A word of caution, because I'd rather say it than not. Blind boxes are designed to make you buy more than one, and the odds of the Magic edition are what they are. Buy a couple for the fun of it. Don't buy twenty-five expecting a gold panda; that isn't how probability works, and I'd sooner keep the customer than sell the box.
The practical bits
- We have them in stock. As I write, most of the big online names are showing sold out or backorder, and the trade press says a lot of UK shops won't see theirs until October. Ours arrived early. That won't last.
- There's a limit per order. We cap the blind boxes per customer, the same as the other retailers who've had them. It's not to be awkward; it's so the boxes go to the children they were made for rather than to someone with an eBay account.
- Keep the box. If you think you might swap or sell a pen, an unopened coffin is worth more than an opened one. Collectors are fussy about condition, and the sealed packaging is part of it.
- Refills fit. The standard Legami erasable refill goes straight in. Black, blue, red, green, pink, purple, turquoise and orange are all in the shop, so a Halloween pen doesn't have to write in Halloween colours forever.
- The glow needs charging. It's phosphorescent, not battery-powered. A minute under a bright lamp gives you a good few minutes of glow. Daylight through a window does a fair job too.
- Don't sticker the pen. A tip from a Legami customer that I fully endorse: barcode labels on the barrel leave glue behind. Ours go on the box.
- The rest of the Spooky Party range is on the same shelf: the Lovely Friends charm pens, the panda plush, the window stickers and the scented candles. If the blind box is a bit much for a smaller child, the charm pen set is the same characters with no gamble. The whole lot is in our Halloween collection.
Come and shake one
Forty-odd years of selling pens and I didn't expect to be writing a paragraph about the thrill of not knowing which one you've bought. But here we are, and I'll admit the coffin on the counter has cheered up September no end.
The blind boxes are in the shop on Callender Street and online for collection, alongside the rest of our Halloween range. Come in, pick one up, shake it if you must, and open it at the till so we can see what you got. If it glows gold, I'll want to know.
