Like the synergy big balloon rising, Josh cries, When my hot air balloon air gets hotter it'll rise! Rising upward from hilltop into cloudy skies. The balloon synergy is both pretty and fun, It floats on low pressures and highs! When air is heated, it expands, it'll rise! Troy says, the rules of science are synergies but synergies are more, And my favorite synergy is cooperation among three, or four, or maybe more.