I like to do baby pictures every 3 months during the 1st year since they change so much in that time and I needed a new idea since I already did the tutu thing. Obsessively Stitching has a tutorial here on turning a dollar store scarf into baby legs. I don't have a serger so I did the zig zag stitch instead and they turned out great. I love 'em! Go make some of your own!
Edited to add: Check out my other pair of baby legs here made from knee highs with a cuff at the bottom.