Using the smallest loom, I have made a number of baby hats. These work up wicked fast, but you have to use either bulky yarn or double strands. That’s one draw back with the loom. You can’t use thin yarn unless you double or triple it. Just for the heck of it, I tried using one strand of Bernat, which is I think considered 3ply, and it was a mess, loose, falling all over the place. Luckily, since I use so much baby yarn like this, I have lots of left overs in fairly good sized balls, and I was able to use two strands at once with some success.
Here’s one of the finished hats where I used one strand of Pale Blue yarn and one of Denim Marl: