Lego Digital Designer - Free for personal use

This has to be the coolest thing next to solidworks, enjoy! PC and Mac platforms.

http://ldd.lego.com/download/

Disclaimer
The LEGO Group of companies (LEGO) is providing LEGO® Digital Designer 1.6 (the Software) at no charge. Any commercial use of the software is strictly prohibited. The entire risk arising out of the use or performance of the software remains with you. The software is provided as-is without any warranty of any kind. To the maximum extent permitted by applicable law, in no event shall LEGO be liable for any damages arising out of the use or inability to use the software. To install and use the software, you must agree to the terms of the LEGO Digital Designer 1.6 License Agreement included with the software. Please be sure to read the License Agreement before installing LEGO Digital Designer 1.6 on your system.

thanks

I would have so loved this when I was little!