Consider dressing your kid in a navy horizontal striped t-shirt with brown trousers for a comfortable outfit that's also put together nicely. Tan boat shoes are a nice choice to finish this outfit.
This combo of a navy t-shirt and beige shorts has all the potential to become your son's favorite. Complete this ensemble with tan boat shoes.
Suggest that your munchkin wear a light blue long sleeve shirt and red shorts to get a laid-back yet stylish look. For footwear go for a pair of tan boat shoes.