Three Little Pigs STEM Challenge is a science experiment that focuses on the stability of structures and properties of materials. It can be used for both early years science and older children. This challenge involves creating different types of Three Little Pig houses using materials such as sticks, straws, marshmallows, elastic bands, cardboard, LEGO, sugar cubes, and a squeezy bottle or small fan for wind. The article provides instructions on how to set up the challenge and explore each area with the materials. It also suggests extension tasks, such as spraying the houses with water and testing their stability. The article concludes by mentioning other storybook themed science experiments and key science topics covered in the challenge.