Option 1: Stickers
My son loves stickers, so every time he used the potty he would get to place a sticker on his chart. This was rewarding enough for him to do as he loved to place that sticker on his chart. And when he made it to the end of his chart I would also gave him a bigger surprise reward.
Option 2: Treats
Not my personal favourite but have known this to be quite successful a few times :). If you find your child isn’t really motivated by placing stickers on their chart, you may want to give them a small treat after every successful potty attempt. I had a jar and he would place his hand in to see what he got.
Option 3: Progress Chart
I personally think the sticker method was the most fun for him, but you may also decide to use the chart as a progress chart. fun for your child.