Your kid will look cute in a brown sweater and navy shorts. As for footwear your kid will love navy sneakers for this look.
Keep your tot's outfit laid-back in a brown sweater and black sweatpants. And why not add white sneakers to the mix?
Suggest that your son wear a brown sweater with navy jeans for a fun day out at the playground. This getup is complemented nicely with dark brown sneakers.