Most kids love sweats, regardless of whether they play six sports or none. Sports apparel manufacturers such as Champion offer high-quality sweatpants and sweatshirts for boys and girls. You can find warm-up sweatsuits in cotton, cotton blend, or mesh, any of which will keep kids comfortable before and after sports, when they are doing their homework, or when they're sitting in the car to go to grandma's. When purchasing boys and girls sweats choose a larger size to allow for the child's growth and the garment's shrinkage. Although some styles of sweats are shrink-resistant, others are not, especially if they are 100% cotton and you throw them in the dryer, so hang them dry if you're in doubt.