SURPRISE! They were enclosed by the wave as it came in suddenly.
The waves were fun to run from as they were totally unpredictable! We wrote in the sand with sticks and eventually watched the water wash over our art. Instantly, the canvas was clean, made new. I love this idea of the pre-wave words and pictures being washed away and the opportunity to begin again.... a second chance to change it for the better or to simply start anew.