The 28-year-old has been prepping the kids at Short Street Preschool and Occasional Care Centre ahead of the shave on March 17, but she reckons there will still be some shocked faces when her long brown hair starts to fall.

"I've always wanted to do it because it's such a good cause, and people keep asking me if there's anyone in my family or circle of friends with leukaemia but there isn't," she said.

"I just really want to help others and I've been using it as a bit of a learning tool at preschool too - to develop empathy among the kids, and to show them that it's important to care for people in their community.

"They're really interested and excited about the day, which will also be a 'funky hair day' where they will be able to get their hair coloured with coloured hairspray or hair chalk."

Leukaemia Foundation regional development manager Nina Field will also attend the event to give a presentation.

"You'd be surprised how aware children are nowadays about cancer," she said.

"Unfortunately a lot of them have seen people ill with cancer or people with no hair. So they are very receptive to the information."

The Leukaemia Foundation is urging more Australians to take part in the World's Greatest Shave to help raise $6.5 million for blood cancer research and support.

"Around 12,000 people are expected to be diagnosed with blood cancer [leukaemia, lymphoma or myeloma] this year - that's an average of about 31 people every day," Ms Field said.

"It's so important to get behind the shave because it helps the Leukaemia Foundation provide services to people when they are at their most vulnerable."

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