A sprinkler is a garden device that sprays water onto your grass or plants. You can attach a small lawn sprinkler to a hose in your yard when your flowers are looking droopy.
Sprinklers are mainly used to irrigate, or provide water, to plants. There are complex systems of sprinklers that can be installed in the ground for a large area, like a public park or an estate's acres of lawns. The more common type of sprinkler hooks up to a hose and can be moved wherever it's needed — including in the middle of a yard for kids to run through in their bathing suits.