I knit ‘worry-eaters’ for Knit for Nowt - a charity run entirely by volunteers, who send therapy items out to children’s therapists all over the U.K. There is apparently always a massive waiting list. Such items are evidently just not available to buy, and even if they were, budgets are obviously limited. They all have a big mouth pocket, so children can write down worries or draw a picture, and give to him to ‘eat’.
Patterns (all donated by the designers) are free on the website but you do need to be a registered maker first.
I mostly make these, since they are apparently popular with the children - big and fat and cuddly! - and always turn out well. He’s fairly quick to make - 2 strands of DK on 5 mm needles. But there are lots of other lovely patterns.