From Crocodile Clips:
Yenka is a new generation of educational modeling tools from Crocodile Clips. Equally at home on whiteboards or when used by individual students, they let you experiment with the topics you're teaching in a safe, accurate virtual world. Each Yenka product is based around a powerful modeling engine. This lets you use and edit the rich, interactive content from our extensive online database - or even create your own lessons from scratch with just a few clicks. These can then be uploaded to your VLE if you wish. For any Yenka product you buy, you'll get free upgrades until July 2012. Also, there's no recurring subscription cost - once you've purchased, you can use the software on any computer in your school. To help spread the word about Yenka, we're offering free home licenses for all of our Yenka tools. There's no need to purchase anything. Just download Yenka and you will be able to use all of our Yenka products at home free of charge. If you have more than one Yenka product, they fit seamlessly together, sharing a single user interface, keeping tools and techniques consistent across subjects.
Version 2.7 includes the new modules (Electricity and Magnetism), as well as the brand-new Coordinates package.