💡 Paper Circuit Light-Up Greeting Cards (STEM Activity) In this hands-on STEM activity, students create greeting cards that light up using a simple paper circuit. By following printed circuit paths and step-by-step instructions, students explore basic electricity concepts while combining science, engineering, and creativity. This activity is classroom-tested, beginner-friendly, and does not require wires or soldering. ⭐ What’s Included Step-by-step building instructionsSimple explanation of h