Outside, children gain more knowledge about nature, it teaches children characteristics of different materials. For instance walking across tiles feels different than walking on the grass. In a playful way, children learn to measure and estimate, to think logically and to provide technical and spatial insight. Toddlers are besides all these things also very focused on cause and effect. Like, what will the ball do when I release it at the top of the hill? Or what happens when I pick up the insect and put it on my hand? They learn by their own curiosity and we give them their space to do that.