This Skit is meant for Boy Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

3 scouts
blue tarp folded lengthwise to be a stream.
Nalgenes or water bottles.

Scouts 1 and 2 are walking across stage area with scout 3 behind curtain or tree (out of sight).

Scout 1: I'm tired.
Scout 2: I'm thirsty.
Scout 1: Lets go fill up our water bottles in that stream.
Scout 2: (as they kneel down next to river) Do you think it's safe?
Scout 1 : Of course! Look how clear it is and how fast it's flowing.
Scout 2:O.K. whatever.

(Scouts fill waterbottles and start drinking.)
Scout 2: This tastes funny.
Scout 1: Hey, water's water.
(Just then, Scout 3 comes out from hiding, pulling up his fly and stretching.)
Scout 3: Ahhhhhh. Relief.
(Scouts 1 and 2 spit out water and run off stage.)