petal, pedal

Petal or petal ( pet uhl ) means one of the parts of a flower--one of the units that make the colorful "flower" part--
She pulled each petal off the daisy to see if the old rhyme would tell her if he loved her.
The bowl full of rose petals made a wonderful scent in the room.

Pedal or pedal ( ped uhl ) means the part of a bike you push with your feet, or the part of a car or machine you push with your foot--
Take your foot off of the gas pedal and press down on the brake.
One of the pedals of his bike was broken.
Pedal may also be used as a verb ( action word )--meaning the act of pushing the pedals of a bike, or something that operates the same way ( but not a machine or car )--
It is hard to pedal up a hill.

Peddle or peddle ( rhymes with pedal ) means to sell, as from door to door, or on a street corner--
We'll have to peddle this band candy all over town.
You need a license from the city to peddle goods on the sidewalk.

Now that you know that, you can say--
"If you want to peddle candy from your cart, just step on the pedal as lightly as if a flower petal had landed on it."