Mia and Open -- Waterballoons.
The minute Mia had discovered there were water balloons and water guns she was basically a kid at Christmas. She was trying to be polite by staying in a designated area, but the water was flying pretty liberally.
It wasn't long until she'd stashed herself in a tree, mostly covered by the foilage. She watched the fight and splashing go on, waiting for the proper time to unleash a couple balloons.