Home-made cakes, cupcakes, muffins, slices, rocky road and fudge will be on sale from 8am to 2pm as well as jams, preservatives and a sausage sizzle.
About 1500 people are expected to cast their vote at the school, which is in the Federal seat of Curtin, held by Liberal deputy leader Julie Bishop.
While parents decide whether to vote for one of the major or minor political parties, children will be able to colour in, have their face painted or draw a prize from the lucky dip.
Adults can also enter a raffle to win bottles of wine and some barware donated by school families. All money raised on the day will go directly to supporting the school’s IT department and replacing worn out sporting equipment.