A child watches her classmates as they repot flowers at the Child Development Center II at Joint Base Andrews, Md., for Earth Day, April 22, 2015. The children repotted pansies and marigolds inside, with plans to plant sunflower seeds outside in the near future. (U.S. Air Force photo/Senior Airman Mariah Haddenham)

Flowers sit in a classroom at the Child Development Center II at Joint Base Andrews, Md., before they are repotted by children for Earth Day, April 22, 2015. Teachers educated the children on what plants need to grow with plans to plant seeds outside with the children in the near future. (U.S. Air Force photo/Senior Airman Mariah Haddenham)

Children gather around flowers at the Child Development Center II at Joint Base Andrews, Md., for Earth Day, April 22, 2015. The children repotted approximately 60 pansies and marigolds, with plans to plant approximately 100 sunflower seeds outside in the near future. (U.S. Air Force photo/Senior Airman Mariah Haddenham)

Children reach for flowers at the Child Development Center II at Joint Base Andrews, Md., on Earth Day, April 22, 2015. Teachers educated the children on what plants need to grow and will also be planting seeds outside with the children in the near future. (U.S. Air Force photo/Senior Airman Mariah Haddenham)

Children help each other repot flowers at the Child Development Center II at Joint Base Andrews, Md., for Earth Day, April 22, 2015. The children repotted the flowers with their teachers to learn more about plants and how they grow. (U.S. Air Force photo/Senior Airman Mariah Haddenham)