I used a tank top I found at Walmart for Henry's shirt. I was going to fabric print one, but I ran across this awesome striped one and couldn't pass it up.free Charles pants sewing pattern. I just shortened them and added some straps.
For the Canadian part, I added some cool embroidery to the chest piece. My sewing machine has lots of embroidery stitches and I found one that looks like the maple leaf and reminds me of the Canadian flag. It's the perfect touch!