Do you feel you're getting a bit old to take part in Easter-egg hunts? Well, this may change your mind.

At Easter, 100 giant eggs created by some of New Zealand's best-known artists and designers will be hidden across Auckland, Wellington and Christchurch for 33 days, all in the name of charity.

The Whittaker's Big Egg Hunt, based on a similar hunt in London in 2012, invites adults and children to find 100 one-of-a-kind eggs, either for fun or to compete for the under-wraps grand prize.

Some of the notables to design eggs include Dick Frizzell, Dame Trelise Cooper and Denise L'Estrange-Corbet.

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After the eggs have been found they will be auctioned off, with the proceeds being handed to the Starship Foundation.

Frizzell said it was daunting to be given the task of designing an egg.

"At first, I thought it looked lovely as just a blank egg, so I thought I should just sign it and leave it at that. But even a bad idea like that got me started on the creative process.

"I didn't want to over-think it and try to be too clever or witty. In the end, I went for quintessential Dick Frizzell - the minute you see the egg, you'll know it's mine."

Eighty of the eggs will be auctioned on Trade Me, while 20 will be put on the block at a gala event on April 16. The main egg hunt will run from March 21 to April 22.

For more information, www.thebigegghunt.co.nz, www.facebook.com/BigEggHuntNZ