Playsaurus · No. 108 · 3.5 to 7 years
Everyone sits in a circle. One walks round tapping heads saying duck, until they say goose, and then there is a chase.
Sit in a circle, as few as three of you. One person walks round the outside, tapping each head gently and saying duck, duck, duck. At some point they tap a head and say goose. That person jumps up and chases them round the circle. If the walker gets back to the empty space first, the goose takes over walking.
Younger children say goose on the first tap every time, because waiting is the hard part. That is fine and it is the skill the game is building. The anticipation while being tapped is most of the fun.
With only one child, walk round a circle of soft toys with them and let them pick the goose. If the chasing gets too fast indoors, make the rule that everyone walks.
Fun & Active Playgrounds, How to play Duck Duck Goose. The whole video.
https://www.youtube.com/watch?v=vzQcL8dNEUw&t=0s