Where does the idea of the weighted stuffed animal come from?

A weighted stuffed animal seems like a new product, but the idea behind it is older. It comes from two directions: the idea that firm pressure can bring calm, and the comfort of a familiar cuddly toy. This is the history of the weighted stuffed animal: how those two lines came together, and what research discovered along the way.

How did it start with Temple Grandin and the squeeze machine?

The best-known beginning is Temple Grandin's squeeze machine. This is a device with two padded panels that firmly press on the body from the sides. It is also known as the hug machine. Grandin used the machine herself.

In 1992 she described the calming effect of deep pressure in a scientific journal. She wrote about people with autism, about students and about animals. The article relied mainly on clinical observations and her own experience, and Grandin was both the inventor and a user. So it was not yet a controlled study, but it did become an important starting point.

In 1999, a small trial with the machine in 12 children with autism gave the first cautious indications, which the researchers themselves called preliminary. You can read what deep pressure is exactly and what that trial showed in Deep pressure: what is it and why does it feel calming?

What role did occupational therapy play?

Occupational therapy has long had an approach called sensory integration. The idea is that some people process input from their surroundings and their own body differently, and that targeted experiences can help with that. The best-known form is called Ayres Sensory Integration.

Separate aids also came into use, such as weighted vests and weighted lap pads. They were used with children with autism or ADHD, among others, including in the classroom.

Researchers and doctors also took a critical look. In 2012, American paediatricians wrote that the evidence for sensory therapies is limited. They advised setting goals in advance and keeping track of whether a treatment helps. A review from 2015 found few positive effects for separate sensory aids, such as weighted vests. A review from 2018 made an important distinction. For the full therapy according to Ayres, given by a specialised occupational therapist and aimed at personal goals, there are encouraging results in autism. Separate aids that are used only on the basis of a diagnosis do not follow that approach.

How did weighted vests and blankets come into the picture?

Children wore weighted vests during the day, in studies usually with a weight of 5 to 10 per cent of their body weight. They have been studied often. Reviews from 2009 and 2017 found no clear effect in autism. In a small study from 2011, support staff who knew which child was wearing a vest did see improvement, and teachers wanted to keep using the vests. Measurements showed hardly any change.

Then the weighted blanket came along. An early study from 2008 had 32 adults lie under a blanket of almost 14 kg for a short time. Of them, 63 per cent said they felt less anxious. It was a small, exploratory study. In 2019, an American advertising watchdog ruled that the study was not suitable for backing up claims about anxiety. A manufacturer had to change its advertising as a result.

Larger studies came later, mainly from Sweden. In Sweden, weighted blankets were also prescribed through the healthcare system. According to the Swedish university where the large ADHD study took place, since 2022 Swedish healthcare providers no longer prescribe subsidised weighted blankets for children with ADHD and sleep problems. Meanwhile, the blanket became an everyday product, sold in department stores and discount shops. You can read what research into blankets shows in Does a weighted stuffed animal really help?

Where does the 10% rule come from?

You often read that a weighted aid should weigh about 10 per cent of your body weight. That rule does not come from research. According to a Canadian report from 2010, the ratio for vests was taken from advice on the maximum weight of school bags. The British professional body for occupational therapists says the number comes from manufacturers' instructions.

In 2008, occupational therapists in Quebec advised 10 per cent and a maximum of 20 minutes at a time. Their colleagues in Alberta wrote a year later that there is no clinical evidence for either rule. On top of that, the rule was made for blankets and vests. It was never meant for a stuffed animal that you hold. For that, simply choose the lightest weight that still feels pleasant.

How did the safety rules come about?

In 2008, a nine-year-old boy with autism died in Quebec. At school, a teacher had wrapped him in a heavy blanket because he would not calm down. He was left alone for more than twenty minutes. Afterwards, the coroner drew up rules. The head must always stay free, a child must never be left without supervision, and the child must be able to get out easily by themselves. A weighted aid must never be used to restrain someone.

A Canadian report from 2010 found no evidence of effectiveness or safety. It advised use only under supervision and with consent. The report also warns that, under Canadian criminal law, using it as a punishment can count as unreasonable behaviour. Those lessons still form the basis of the safety rules you can find under safety.

What do comfort toys have to do with it?

The second line is much older: the cuddly toy as a source of comfort. In 1953, Winnicott described the transitional object in a psychoanalytic journal: the first object, such as a soft toy or a piece of cloth, that a young child experiences as truly their own. He saw such an object as a normal part of development.

Later research confirmed that such an object is very common. In a study from 2014 with more than 1,100 pairs of twins aged 3, one in three children had an object they were attached to. Almost a third of these objects were a soft doll or a teddy bear. According to earlier research, this share is sometimes even higher in Western countries. In cultures where children are close to their mother day and night, it is much lower. You can read how comfort and holding something can help with grief in Comfort in grief: can a weighted stuffed animal help?

How did the weighted stuffed animal finally come about?

We have not been able to find out who made the first weighted stuffed animal, or when. What is clear is that it brings the two lines together beautifully: the calm weight of a blanket and the comfort of a cuddly toy to hold. On top of that, it is much lighter than a blanket. Most weighted stuffed animals weigh 1 to 2 kg.

These days, weighted stuffed animals are sold everywhere, including at large chain stores, and children aged 3 and over, teenagers and adults use them to unwind. So the idea is older than the product, and research into the stuffed animal itself has only just begun: the first study we found is a poster presentation at a dental conference in 2025.

You can read how a weighted stuffed animal compares to a blanket or a vest in Weighted stuffed animal or weighted blanket: which suits you? and Weighted stuffed animal, pillow or vest: the differences. You can find more background under the basics.