My little helper here is Grimalkin. He needed to have his blushing touched up, and I thought a tutorial may be useful. Here goes!
First, you will need a length of elastic about 20in long folded in half and tied in a knot. Your mileage may vary, and you may need shorter elastic to get him tighter.
They are very top heavy, and benefit from sueding the head/neck area.
First, place through the head.
Thread the little flat piece like this.
Second, add the head back and pull tight.
Tie the elastic in a knot, tighten as needed, and hook the knot over this little resin ledge in the pelvic piece here. Voila! Tail is strung.
Next, thread the main elastic through the torso and the tummy.
Pretty simple isn't it?
If you have to redo the arms, take a small bit of elastic and tie it in a knot. Keeping the knot in the middle even with the neck, thread one loop through each shoulder and pull tight.
Pipos Cheshire cats are not very poseable, but sueding and solid stringing can help.
There will be a sueding tutorial here soon. [link forthcoming]
Here's a little bit of what Grim can do: