Last week we shared with you the new nxtprograms.com website that has some great robot designs with complete building instructions (and programs) for you to follow. This is just a reminder that the site updates regularly - the latest is a personal favorite of mine - the Robot Lawnmower. It's a nice little design and very true to the real world object - it's even got push button start! Check it out here.
I especially like the "Challenges" that are provided for learning more and expanding the functionality of the robots.