Pupils at John Burns Primary School in London had an explosive morning of chemistry recently.
They worked out how to mix and separate solids without touching the components, and how solids and gasses can be mixed with liquids and separated again.
Then speed, dexterity and teamwork were essential for accurate and safe working. Thermometers, syringes and timers were used in quick succession, and many sections of Vitamin C tablets in 10ml of water released enough carbon dioxide to blow the lids off dozens of pill pots.
And all before lunch!