Well, I missed this one earlier, so this is too late for Xmas: Flying Guinea Pig Tree Ornament

Info on flying/travelling with cavies:
Traveling in Planes
Traveling in Cars
(that page has some misinformation... when you go on a picnic, you do not eat with the cuy, you eat the cuy! *G*)

And just in case you might want to shoot them from a cannon, please remember that loud noises set them off:
Farting cavies

Roasted guinea pig = Cuy al horno