Here is another version of a Webkinz Sweater, with a matching scarf. It’s easy enough that my son can make them, and the scarf is a nice learning tool for the child who wants to progress to the sweater.
For basic crochet instructions: http://www.lionbrand.com/faq/learnToCrochet.pdf
For the scarf, form a loop in your yarn and make a chain that is 5 links plus the initial loop, plus what is on the hook. Neither of those count.
Your scarf will be 4 stitches wide (the 5th is the turning stitch). The beauty of this for kids is that they don’t need to figure out where to put the next stitch. For each row, simply count from the far left end – first count to the 4th (not counting the initial 1/2 stitch that came from your initial loop) and put the hook through number 4. Single crochet (wrap up around the back, pull through 1, wrap again, pull through all). Next count to number 3, then 2, then 1. After doing these 4 stitches, make a single chain stitch for the turning row, turn, and do it all again, counting back each time until you know by heart which stitch to start with and which one is next. So it starts like this, where x is your initial loop, and h is your hooked loop:
x 1 2 3 4 5 h
Stitch 4, then 3, then 2, then 1; chain; turn; repeat. Note that on row 1 you go under 1 piece of yarn, but on all other rows you go under both yarns of the “V”.
Next, the sweater! Loosely chain on enough length to slip over your Webkinz head and form the neck. Using a simple slip stitch and making sure the chain is not twisted, join together. Crochet around and around (again, on row 1, going through 1 yarn, and through 2 after that) until it is the right length for the neck and any cuff you want. Try it on your dog, and leave it on for the next step.
Next you are going to make the body. Either rotate the collar so that your hook is at the side, or crochet over to one side. Then make a chain stitch (still attached) about 1/2 the circumference of the dog so that it will go under his legs and reattach to the main crochet. Straighten the chain, run it under his legs, and join this chain to the main crochet using a slip stitch. Now simply crochet around and around this new circle (either on the dog or off) until it reaches his back legs. If you would like a rounded edge on the back, turn around without using a turning stitch, and go backwards for a few inches and end with a slip stitch before tying off.
Here is the pattern I used as a base for the sweater, though I believe mine is simpler: