We've heard of ‘thinking outside the square' – but this is a game all about dumping inside the square. It involves a large field, a well-fed cow and cow pat.

Bethlehem School's annual Cow Dump and Gala returns to the Carmichael Rd school on Sunday, with another chance for visitors to win $2000 from a lucky cow dump.

Cameo will take centre stage tomorrow.

On May 24, ‘Cameo' the Jersey cow will once again stand centre stage on a gridded field.

It's just a normal day for Cameo, but all eyes will be on her rear end and where she poops.

Gala-goers purchase tickets that correspond to grids on the field, and the person holding the ticket to the square Cameo poos in first, wins the prize money. There's also $200 prizes for the eight surrounding squares that she dumps on.

'It can happen early, or it can happen late,” says Bethlehem School principal Brian Field.

He says Cameo's owner gives his cow the right amount of feed to get her going. 'He has it down to a bit of a fine art now.”

While waiting for Cameo to do her business, there'll be plenty of family entertainment, including games, pony rides, yummy food, raffles and more.

Brian says the annual Cow Dump and Gala has been going for about 15 years and is the school's major fundraiser for the year.

Bethlehem School's annual Cow Dump and Gala is on May 24 from 11am-2pm at the Carmichael Rd school. Entry is free. Cow dump tickets can be purchased at the school.