If you are using this activity with younger children, write the word YES in pencil on one of the flat stones and the word NO on the other stone. Younger children trace over the words with a marker.
Older children write their own words on the stones.
Give them an opportunity to practice balancing the stones on their shoulders so that the YES and NO words can be seen. Ask the children the following choice questions. If their answer is yes, they remove the no stone from their shoulder. If their answer is no, they remove the yes stone from their shoulder. If at any time during the activity, they purposely bump their own stones off or someone else's they return them to you.