DIY Rainbow Crystal Forest Recipe Materials: - Pipe cleaners (various colors) - Alum powder (potassium aluminum sulfate) - Boiling water - Food coloring - Glass jars or heat-safe containers - String or thread - Pencil, chopstick, or skewer (for suspending) - Scissors Directions: 1. Shape the trees: Begin by twisting the pipe cleaners into small tree shapes. Create a trunk with several branching arms. Trim the branches so that the tree fits comfortably inside the jar without touching the sides. 2