hunt the duck
duck whistle, duck (explorer)
send the duck out blowing the whistle intermittently with the duck constantly moving.
first group to find him win.
to prolong the game give the duck some eggs, possibly one duck per group hunting, the task is for them to collects eggs off the duck, the most collected win. or can add letters to the eggs to spell a word. if making difficulty harder then require a question to be asked to obtain an egg. one question per duck but each only have one of each teams egg, if question wrong they are given broken egg they have to return to base before seeking a next question/duck.