PlayMonster Lauri Action-Stackers - Big Builder Set It's the classic Lauri Tall-Stacker pegs, now with motion and new ways to build! Pegging used to only go up, but now it goes out and around. It's a freeform, colorful activity! Engaging and educational, promoting STEM principles, plus fine motor skills, logical thinking and imagination! Includes enough pegs, connectors and wheels to build multiple creations at once Fun for ages 3 and up