Plain leggings are perfectly fine, but sometimes you just want ruffles and LOTS of them ... like EXTREME ruffles.
If you don't have a leggings sewing pattern yet, you will LOVE the Ruffle Leggings pattern from Jocole which covers sizes newborn through 14 and includes the dolly size. The Ladies Basic Leggings covers sizes XS through XXXL. They both include full length, capri length and short length and can be made with or without euro ruffles along the hem.
Back to the extreme ruffles ... this is a different variation and you are going to LOVE it. These are super cute leggings that your sweetie won't ever want to take off.