Challenge Title: Where Do Germs Go? Challenge Summary: Students investigate how germs can spread through touch in a classroom. They use a visual transfer activity to observe contamination and then design a class hygiene routine. Essential Question: How do germs move from place to place? Engineering Connection: Engineers design safer systems, surfaces, and cleaning routines to reduce contamination in schools, hospitals, and public spaces. Learning Goals: - Explain that germs can spread through contact - Observe and record transfer patterns - Design a simple classroom hygiene solution