The pattern called for a dk wool, but I decided to use my favorite baby yarn that I happened to have sitting in my knitting cupboard. I followed the pattern with two exceptions. 1) I did not buy a pom-pom to put on the tip of the booties, and 2) I gathered the teal top a bit to make the boot more curved (see below). The overall effect is subtle, but I think that it enhances the playfulness of the booties.
This was a fun project! I almost forgot to invert the colors when I started the second bootie. I hope my pal enjoys them!