Target
If you mean from content to happy or something like that, just buy your neopet a cool toy to play with. :) you can obtain them from the local plushie shop in the neopet central. Some cheap toys are: pinixy keyring, red tuskaninny plushie, and blue mynci plushie.
buy a neopet plushie from store and use the code
i think its like yo buy a neopet plushie in a real life store then on the tag theres a code and you use that code to unlock special items online
Ebay.
buy a plushie for real
you have to go to California to find one
http://www.neopets.com/market.phtml?type=wizard
you can get the big raccoon plushie at the conservation museum where appondale is you click on the sale where the rabbit is and the tiger and that's how you get the raccoon! there are many other stuff that you can buy!
Buy it at the Bookstore, get it in the Money Tree, and buy it at the Igloo Garage Sale.
Buy one from another user via trading post and auctions.
You can purchase a Mario Plushie at any Toys-R-Us.
Buy Magic Goop at the pharmacy. Hope that helps! :)