I just made a kid's pouch sling and matching capri pants with side vents for a little 3 yr old who is enamored by my sling. She loved the gift and immediately put it on.
I should've taken a pic for SNS but I had to wrap it and give it away fast!
I used a peach colored chintz from my stash that had little flowers and turquoise ribbons on it (I thought I hated the fabric)... it turned out really cute.
I didn't have a pattern for either - so I just winged it... For the sling, I used the length from my elbow to my fingertips, times two and plus 6 inches... and 30 inches wide. I sewed pleats onto the should part of the sling to make it easier for her to use.
For the capris, I used a boy's shorts pattern and made them longer - then did little side vents... They're wide capris - but really comfy.
HTH!
Maria