Baking Soda Ghost Balloon Experiment You Will Need: 1 empty plastic bottle (water or soda bottle works best) 1 balloon (white or glow-in-the-dark is perfect for a “ghost”) 1–2 tablespoons baking soda ½ cup vinegar Funnel or small spoon Black marker (to draw the ghost face) Optional: Glow stick liquid or a tiny LED light (for glowing effect) Tray or plate (to catch spills) Instructions: Create Your Ghost Balloon: Use a black marker to draw a spooky or silly ghost face on your balloon. (Optional)