Evaporation
Since Willy wanted to join the army, he had to pass an extremely hard test. Fortunately, he passed the test and they told him he needed to gain some serious energy to be evaporated. The heat energy from the sun gave Willy the power to evaporate. According to the humans, evaporation was a change of state from liquid to a gas. But, little did they know, it was really Mother Nature drafting new army molecules. The molecules, ready to be used in the army, were extremely hyper and therefore flying around bumping into each other. Soon, after hours of strenuous training, he was promoted to Captain and was ready to lead his troops into battle.