NXT - Snow Crawler
Here is another great robot from long-time reader bazmarc.
"Take an 8263 Snow Groomer alternate model, mix it with an NXT kit, wait for a sunny winter day and you get this great little Snow Crawler -- i really had fun filming it and i felt like a kid again (ok so i often do :) "
It seems to tip over easily probably because of the 'Brick', possibly by making the center of gravity lower to the ground (some how) would give it more stability.
Still great build!