To sign chase, form the ASL letter A sign with both hands (that is, drawn into a fist with the thumb sticking out). Keeping the non-dominant 'A' hand steady, twirl the dominant 'A' fist towards the other fist, until the backs of the fingers on your dominant hand touch the base of the thumb on your other hand. It is as if one hand is chasing after the other.
Teach your baby or toddler the chase sign when watching a chase scene on TV or reading it in their story book.
Teach your child this sign in the context of a story or when watching an actual chase on film or in the news.