Nice variation of the original 'tag'. One child is the ticker. The rest runs away. The catcher tries to tag someone. When a child is tagged, he or she puts his or her hand on the spot that was tagged. Now the ticked child is the new ticker. If another child is ticked, he may take his hand away from his spot.
For example: Child A taps child B on the shoulder. Child B puts his hand on the shoulder and tries to tap the next one. He taps child C on the upper arm and can again release his hand and just run away. Child C puts his had on his upper arm and starts tapping.