Look for wildlife, like birds, bugs, etc. Once you spot something, spend time observing it and look for behavior patterns. Then, talk about it with a friend or teacher.
Take some time and look up into the sky. Try to find pictures in the clouds. See how many you can find. Then, talk about it with a friend or teacher.
Stop what you are doing, find a seat somewhere quiet, and close your eyes. Listen for noises around you (nature, cars, students, etc.). Use your sense of smell to become aware of your surroundings. Feel the grass or dirt beneath you and the breeze on your skin.
Take a library book, or a notebook and pencil to a quiet bench. Relax while you read a few pages, or write a calming note to yourself or someone special. Use this time to reflect on your day and how to make the rest of the day better.