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St Nicholas CE Primary School

Easter Holiday 2

Lemon Volcano

Offline warm up


Which is the best invisible ink? Write 3 messages using milk, lemon juice, and vinegar. Allow to dry. Heat up the paper with a blow dryer to see message appear.


Online warm up


Play a coding game at



Main challenge - Make a Lemon Volcano!


What you need


A lemon

A pan or tray
Knife (and an adult to help)


Bicarbonate of soda (baking soda)

Food colouring


There isn’t much explanation from me needed for this one team – watch the video below to find out how to create a lemon volcano. Send me your pics!

Contact Details and Useful Links