Mattel Inc.’s American Girl’s in-store cafe now features new adult cocktails and grown-up clothing that mimics the outfits worn by its dolls. LEGO A/S has over 100 sets designed specifically for adults. Build-A-Bear Workshop Inc., which lets kids design their own teddy bears, has a line of custom stuffed animals just for customers ages 18 and older. Even McDonald’s Corp. is now serving adult Happy Meals. (Yes, you get a toy.)