Here's a kid-friendly explanation of what makes bubbles stronger, with a simple experiment you can try.
What a bubble is
A bubble is a thin film of soapy water that holds air inside. The film is two layers of soap with a tiny layer of water between them.
What makes a bubble strong
- Film thickness matters: A slightly thicker film is a bit tougher to pop. Too thin, and it breaks easily.
- Glycerin or syrup helps: Adding a little glycerin (or corn syrup) makes the film thicker and slower to dry, so bubbles last longer.
- Clean water and clean tools: Dust, oil, or dirt on the wand can weaken the film and pop bubbles faster.
- Humidity and temperature: More humidity and cooler air help the film stay moist and strong longer.
- Gentle handling: Slow, smooth moves with the wand keep the film from tearing.
Simple experiment to test stronger bubbles
- Make two bowls of bubble mix:
- A = dish soap + water (basic mix).
- B = dish soap + water + a splash of glycerin (or corn syrup).
- Blow bubbles with the same wand, trying to keep the bubbles the same size.
- See which one lasts longer before popping. Compare times and sizes.
- Note your observations and talk about what you think made the difference.
Safety tip: Use non-toxic dish soap and clean water. Wash hands after playing with bubbles.