
Grown-up alert!
1 tin can, open at both ends
Your science journal
Dip one end of the straw into the sudsy solution then hold the straw slightly above the surface of the solution. Blow into it very gently. You may have to try several times to make a really big bubble.
When you have made a bubble, touch it gently with a wet finger. What happens?
Make another big bubble. Touch this one with a dry finger. What happens?