You can reach @ http://switchzoo.com
In case you have not visited the site , would advice you to visit the site and then refer the site to you Kids and other parents .
One of the Interesting feature was of Building habitat while learning about various animals. It provides step by step instruction to Kids so they can build habitat as per available options.
Switch Zoo Quest
This part takes Kids on a tour of Switch Zoo and challenges them with animal-related games and activities. When complete the quest, they will know enough about the zoo and animals.
There are other features available would advice you to explore and let Kid enjoy this interesting site