For you to do
You'll break open millions of strawberry cells, then use cold alcohol to make their DNA clump together into a stringy, cloudy blob you can lift with a toothpick.
Grown-up help
A grown-up should get out and pour the rubbing alcohol and stay nearby — it's not for drinking and shouldn't go near eyes. You do the mashing and filtering.
Extract it
Grown-up handles the alcohol
Rubbing alcohol is only for this step and only with an adult. Keep it away from your face and wash hands after.
- Put the strawberry in the zip bag and mash it with your hands for a minute.
- Add two spoons of soapy salt water (a squirt of dish soap + a pinch of salt in half a cup of water). Mash gently again.
- Pour through a coffee filter into a clear cup.
- Tilt the cup and slowly pour cold rubbing alcohol down the side so it floats on top. Watch the cloudy layer where they meet.
What's happening
Soap breaks open the **cell** walls and the salt helps the **DNA** clump together. DNA doesn't dissolve in alcohol, so it appears as a white, stringy cloud at the boundary. That clump is the instruction manual that built the whole strawberry. Note what it looks like — careful **observation** is the whole point.