Check on white shoes and underwear

I need to check on white shoes and underwear for my son, yeah he's growing big. He's only 8 years old but weight 50kg that's too much I know. He's lack of exercise or going for sports, I hope teacher in school let him do spots a lot. They have sports classes during Wednesday and Friday.

I need to check on sales price for white shoes for him to wear to school. Also new underwear for him, he's in need of bigger shape and size now.