The tutu was made using Jalie 2915.
I used the same pattern to make the top of the mermaid costume. The mermaid costume was made out of scraps left over from all those ballet concert leggings I made last year. This Jalie pattern is great for scraps because the princess panels mean you only need little bits. The skirt is basically a tube. The tail is scraps of the lycra sewn onto an organza background.
The camo pants were quickly whipped up to go with an existing shirt. It was only worn for a little while though...turns out he prefers his elf costume from last year.