From this pattern. It was decidedly a learning experience. I learned, for instance, how to knit in the round on double pointed needles, and why not to use metal DPNs when starting with six stitches cast on. I learned to look in my knitting bag for a missing DPN before looking down inside the sofa. I learned a decrease (ssk), an increase (kfb), and short row shaping. Having decided to make the thing a little less boring (single color acrylic worsted, now that's boring) by making its feet a different color, I learned another way to do jogless color changes (as opposed to colorless jog changes). I learned how to hide and secure yarn ends when working on a closed, stuffed object ... thanks to a response by the pattern's author to my question. I learned how to do I-cord. I still have not learned why it's called I-cord.
I was going to make the t-rex next, but Kenny wants a t-rex and his dinosaur is lower priority than his cousins', so I'll follow his request and make a stegosaurus for Mitchell, and then the t-rex. I'm not sure who's going to get the triceratops. I'm sure I can find someone.
A couple more photos here.