Stimming is doing repetitive things that give you sensory input. For instance:

• Rocking
• Waving your hands
• Rolling a marble
• Playing with a tangle toy
• Repeating words over and over
• Ripping paper

Stimming can be really important for autistic people for several reasons. Some are:

• Stimming can make it easier to think and understand what’s going on
• Stimming can prevent overload or help to pull someone out of overload
• Stimming can be expressive body language.
• It can happen kind of automatically. For people who automatically stim, refraining from doing so can be a drain on cognitive resources and make it impossible or difficult to do anything else