Potassium permanganate + Glycerin was my go-to as an amateur experimentalist in middle school / high school. My second favorite was common electrolysis, fillin

Potassium permanganate + Glycerin was my go-to as an amateur experimentalist in middle school / high school. My second favorite was common electrolysis, filling the garage with the smell of chlorine from impurities in the tap water / whatever container I was using at the time. I wonder if kids get to experience the unbridled joy of discovering chemistry on their own, nowadays. Of course, I'm sure parents are better off. My poor mother rushed me to the ER far too many times.