I was friends with someone who was addicted to Webkinz for about 2 years. During those years, tons of new Webkinz catched her interest, and she purchased about 60 Webkinz. Just saying, each pet commonly costs about $15.00, Littlekinz being $13.00. After that time period, she completely stopped, and all of the money invested was wasted, for each pet only gives you a year. This website is fun for a while, but easily can get boring and no longer amusing.
Now, Webkinz became even more rediculous; the new Deluxe membership takes even MORE cash from your pocket, with "rare" or "exclusive" pets, clothes or items. More items have been made for the plush verison of the pet, and takes another several bucks from you.
Now, their games- some are a lot like casino slots, and some are typing or word educational games. What a mix- you can never be sure which catagory will atract your child.
Overall, this website can have a postive or negative impact. It's kind of like a gamble; I would depend on if your child is in touch with common sense or not. But, just be certain that you will loose hundreds to Ganz's Webkinz World.