Head on over to the Major League Baseball shop and you’ll find your favorite team’s logo slapped on all sorts of outdoor clothing—hats, jerseys, jackets and even ugly sweaters. For the true devotee, a favorite team’s logo can nestle still closer to one’s heart (and other places) in the form of bras, swim trunks and even thongs. Now comes the latest addition to the branded-apparel lineup, and this time it’s for young fans—about as young as they get, in fact.