Students research and create Halloween decorations to make a class haunted house. Their projects help them discover different properties and changes in matter, which they include in a summary (1-2 paragraphs). Students in my class made Oobleck, Dry-ice Bubbles, Exploding Ghosts, and Oozing Pumpkins. One student even made a scary "witch's brew" punch. If you can get your hands on dry ice and black lights, they will bring everything together. Students were engaged in the study of matter! It was a hit!