In the hall of the school, they have got these lovely displays made with this technique by one of the teachers, Sarah Williams.
Here you have how it works:
And here you have another easier way of doing it if you dont have the wax heater and the canting pens.
Year 3 and 4 pupils were doing an activity with this technique that was related with Science. They were working with rainforest and they were doing a colourful leaf.