Baking Soda and Vinegar Fireworks Sparkling Fizzy Firework Jars — Safe Kitchen Science Spectacle Ingredients: 6 small clear plastic or glass cups/jars (safe for kids; plastic is fine) 1 cup baking soda (sodium bicarbonate) 6–8 small squeeze bottles or droppers 2 cups white vinegar (distilled) — divide into bottles Food coloring (assorted bright colors) 1 tablespoon dish soap (optional — makes foam last longer) 6 small paper or silicone cupcake liners (to catch overflow) A large tray or shallow b