Tuesday, 9 October 2012

Milk Rainbows/ Fireworks

This is a super fun and simple science investigation that your children will love!
You will need
approx 1cup milk
plate, bowl or similar
Food colouring
Dishwashing Detergent
eye droppers
Paper plate or paper and markers for drawing observations
Cover your plate or bowl with milk
Add just one drop at a time of your food colouring.
Your meant to add the drops around the edge of the plate and if I was doing this in the classroom I'd get my students to use only the primary colours so there would be just three areas around the edge of the plate with the food colouring.
(Things don't go quite the same with a 2yrold lol but the effect was still impressive even with the drops all through the milk)
Add one drop of your detergent and watch CLOSELY!
The colours will begin to move immediately.
Fascinating for little ones!
What is Happening?
The detergent does not mix with the milk. Instead it floats on top and spreads over the surface. As it spreads it grabs the food colouring and pushes it around!
Loving the language so far?

Even toddlers can draw their observations
Talk about how the colours are mixing!
swirling, whirling, twirling
combining, bumping, pushing
Noticing Miss M's eagerness to get her hands in the milk we used the handle end of a paintbrush to mix through creating an amazing result.
You can watch for ages, the colours will keep on moving!

1 comment:

  1. Did this with with my prek group. Instead of dropping the soap in, have them dip Qtips into the soap, then put the qtip in the milk. Don't need to stir, and it is really cool to see the instant action of the soap. and food coloring. Also a little tip, the higher the percentage of fat in the mil, the better it works.