Here's a free crochet baby legwarmers pattern I found on a blog called CrazySocks Crochet! Very cute indeed! I will be trying this pattern out myself as soon as I get a chance. Danyel has some other free patterns and tutorials on her blog too so check it out!
Baby Legwarmers from Crazy Socks Crochet Pattern by Danyel Pink - http://crazysockscrochet.blogspot.com/