Robotics is emerging as an effective strategy for bridging the gap between technology and engineering design in early childhood classrooms (Bers, Seddighin, and Sullivan 2013). Using a science, technology, engineering and mathematics (STEM) grant received from the authors' school, they purchased a KIBO-18 set from KinderLab Robotics (kinderlabrobotics.com) and incorporated it into their morning choice time where students work in small groups coding KIBO. KIBO is a robot that can light up, make sounds, and move. It also has sensors that allow it to respond to sound, light, and distance. Students program KIBO by using wooden blocks to arrange a sequence or program and then scan the blocks using the KIBO body. Once the KIBO is programmed, a button flashes green, and when it is pressed, the KIBO acts out the program. This article outlines a two-week engineering challenge for first-grade students using KIBO to create a cookie jar alarm, as an introduction to our unit on light and sound. This challenge is aligned to the first-grade NGSS standard 1-PS4-4, "Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance" (NGSS Lead States 2013).