DIY Science: Suspended Bubbles

Can you make bubbles float on an invisible cushion? This beautiful investigation illustrates the principles of buoyancy and semi-permeability. What you need A large, clear container such as a small aquarium or large cooking bowl, use plastic to be safer! Bubble solution—you can use a store-bought solution, or make your own using a bubble mix…

DIY Science: DNA Extraction

What you need 1⁄2 cup of cold water 1⁄2 teaspoon table salt 2 teaspoons dishwashing liquid 3 large strawberries isopropyl alcohol (64% v/v), available at pharmacies knife and chopping board, small bowl, fork, fine sieve, small glass and toothpick or tweezers Safety warning Isopropyl alcohol is a highly flammable and volatile liquid. Use in a…