I thought it was so cute! I whipped out the yarn that I had handy and made a couple for my little boys. I had to modify it for the baby, as his head is much smaller, so I just did 50 stitches to the end instead of going up to 60. I also crocheted the teeth instead of using felt (partly because I didn't have any white felt and partly because I liked the look of it better) It worked out pretty well.
Here is a pic of the two monsters in the truck.