Global warming is a dangerous effect on our environment that we are facing these days and it is important to find words, ideas how to talk about it to small children, to encourage them believe, their everyday habits can contribute to Earth saving. They will try to sort waste, save electricity, water, food in their everyday life. They wil realize, how important are trees and another plants. Children can realize their ideas, be creative, learn how to collaborate in small groups, develop their mathematics and engineering skills. Teachers will share their experiences.