120 primary pupils each day are investigating solar cells in our workshop at this year's Milton Keynes "Chemistry at Work" event.
Everyone has the chance to make and investigate a solar-powered fan. The cold weather has deterred no one from being outside to find out how to make their own fans turn as fast as possible. They are amazed to see their fans work even under cloud cover!
The most popular activity is when they link up more than one cell to see just how much faster they can make their fans whizz round.
Find out more about this annual event at ChemistryinAction.com.