The NeeDoh Advent Calendar 2026 puts 24 mini squishies behind 24 doors, one a day to Christmas: a green spinning top, a pink flamingo, a translucent gherkin, a boombox radio, right through to a candy-cane swirl ball. Each teenie is about 3.17 cm, the size that suits small fingers, and every one is exclusive to the box, so there’s nothing to collect or resell. This year Schylling has given it a new retro, psychedelic look. It’s a sensory countdown from age 3, and it lands just as well with a fidget-loving teen or adult who needs something to keep their hands busy.