Toy makers, who are professionals at taking advantage of children’s weird interests, have finally figured out learning to make a toy that replicates what kids like about unboxing videos. Enter the L.O.L. Surprise! doll, a sphere how big is a bocce ball that contains seven layers of packaging. Kids peel away the layers of crinkly plastic, that have stickers and messages and tiny accessories that are surely crunched under many a parental foot, and discover a small, practically naked plastic doll with giant Bette Davis eyes who measures simply a few inches tall.

A lot more than 800 million L.O.L. Surprise! toys have already been sold since their debut in late 2016, plus they were among the top products sold on Cyber Monday this season, according to Adobe Digital Insights. This season, a lot more toy makers have caught to the trend. Parents is now able to buy eggs, pods of foam, cake pops, burritos, and balls of several sizes and shapes containing mystery animals and figurines. (“Unrolling may be the new unboxing,” said Ashley Mady, the top of brand development at the business that launched the burritos, called Cutetitos, in October.) Some balls contain “boy-themed” surprises, such as insects, octopuses, skateboards, ninjas, and a packet of a powdery substance, along with the best, Poopeez, which are rolls of wc paper that hold mystery capsules with names including Lil’ Squirt, Skid Mark, and Toot Fairy. (“These new blind capsules are creating a stink around Kerplopolis faster when compared to a fart disappears in the wind,” according to marketing material on Amazon.)

L.O.L. Surprise! dolls were created by MGA Entertainment, the business behind the oversexualized plastic Bratz Dolls which were a hit in the first 2000s. Isaac Larian, the CEO, explained within an email that L.O.L. dolls were essentially reverse engineered: The business wanted to profit from the unboxing and collectibles trends, therefore it developed L.O.L. dolls. MGA Entertainment was told, initially, that kids had a need to visit a product before they might require it, Larian said. But L.O.L. dolls proved analysts wrong-kids can apparently want things without even knowing what they are. MGA Entertainment has since branched out into L.O.L. Surprise! pets, L.O.L. Surprise! houses, and larger L.O.L. Surprise! capsules, that have a large number of dolls and accessories and retail for approximately 80 bucks.

Initially, unboxing videos are a particularly bizarre phenomenon to model a toy on. Kids are essentially watching other, luckier kids get plenty of expensive toys, playing and never have to work with school, or nap time, or that perennial enemy, broccoli. Some unboxing stars have grown to be millionaires-one 6-year-old named Ryan made $11 million this past year, and all he does indeed is open toys, seek out toys in his pool, look for toys at Walmart, meet life-size and slightly creepy versions of his favorite toys, and go along well along with his parents. His YouTube channel has 17 million subscribers, and a video of him collecting giant eggs from his personal bouncy castle and opening them to reveal toys inside includes a mind-boggling 1.6 billion views.

There are biological reasons small children like watching unboxing videos, and it’s the same reason they’re attracted to surprise toys. Kids don’t really get proficient at understanding and anticipating the near future until they’re about four or five 5, Rachel Barr, the director of the first Learning Project at Georgetown University, explained. At that age, they begin looking forward to things that may happen later on, and they also like watching videos that contain an anticipation aspect to them. But kids of this age don’t particularly like being frightened, so they like videos where they understand that nothing bad will happen. Unboxing videos and surprise toys allow kids to take pleasure from the anticipation without having to be too afraid, Barr said, because they know roughly exactly what will maintain the package, not the precise details.

Read: Why kids want things

Kids will watch unboxing videos over and over-or open surprise toys over and over-because they grab new details each time, Barr said, determining how unwrapping works. One of the most popular unboxing videos on YouTube are of surprise toys, including a 12-minute video with 321 million views when a boy tears open a huge golden egg to locate a load of Spider-Man-themed candy and toys, including a few smaller eggs that he also unwraps. The video, which is packed with commercials, ends with him screaming in excitement as his final egg carries a little Spider-Man.

Unboxing videos have their benefits: They allow kids to hook up with other folks, experience toys that their parents is probably not in a position to afford, and go out, in ways, with other kids, regardless if they reside in a location without a large amount of children or where it’s too dangerous to go outside, according to David Craig, a professor at the USC Annenberg School for Communication and Journalism. Parents may not mind videos where children watch other kids play with toys, he says, if it keeps them out of trouble.

Mary Lynn Hashim was confused when her 6-year-old started requesting L.O.L. Surprise! dolls this past year, before her December birthday. She finished up needing to wait in line outside a Toys “R” Us in NY before it opened one morning to get the toy, since it was sold-out everywhere she’d looked and the store informed her it was obtaining a new shipment. Hashim was standing next to her daughter, who’s now practically 8, as she talked if you ask me, and asked her that which was so cool about the surprise dolls. “You can find an ultra-rare,” her daughter said, discussing among the less common dolls within the spheres. “Or the infant sister. It could be cool easily got the infant one.”

This desire to have rare toys and dolls is what drives the collectibles industry, which itself is helping increase toy sales. In line with the NPD Group, the global collectibles market grew by 14 percent in 2017, to $3.9 billion, led by L.O.L. Surprise! toys. That’s a victory for toy makers at the same time when shops such as for example Toys “R” Us are closing their doors. But for some advocates, the fever over surprise toys shows how successful MGA Entertainment has been at marketing. They’ve convinced kids that toys are about collecting, not about play, Susan Linn, a lecturer at Harvard Medical School and the writer of Consuming Kids: The Hostile Takeover of Childhood, explained. “The problem with these dolls may be the whole point of these may be the acquisition,” she said. “It’s the idea that the items we buy can make us happy.”

Read: The demise of Toys ‘R’ Us is a warning

When kids watched programming generally on television, it had been easier to allow them to really know what was a Television show and that which was a commercial. Given that they watch more content on YouTube, they could have significantly more difficulty telling the difference. Unboxing videos are both a Television show and a commercial; they feature kids playing, but also kids shilling new toys which may have sometimes been delivered to them by the toy maker. Brands create whole TV group of kids using toys-the L.O.L. Surprise! channel has 758,000 subscribers and features two chipper girls who wear a whole lot of glitter and cosmetic and appear with an endless convenience of excitement over small plastic dolls. In a single video, girls talk about how precisely great it is to obtain a doll you curently have, because you then have twins, or “BFFs,” or perhaps a whole dance crew. Other consumers have made and uploaded their own L.O.L. Surprise! videos, which themselves have an incredible number of views; some feature kids who are so young they are able to barely talk.

Jen DelVecchio’s kids, ages 10 and 4, don’t watch TV anymore. Instead, they watch videos on an iPad. However they keep returning to unboxing videos and commercials on YouTube, which will make them go crazy over L.O.L. Surprise! toys. She buys them for special occasions, she said, but finds that the youngsters abandon them after opening them. “I believe with my kids, the excitement is more unwrapping it than it really is using it,” she said.

For Linn, this habit-of getting something and immediately casting it aside for something new-is what’s driving the popularity of surprise toys. Kids and adults alike have short attention spans, and so are hungering for adrenaline hits to have them during the day. Kids receive those adrenaline hits by getting and opening new toys, and casting them aside. “We are in basically an ADD culture, where we all have been encourage