This big yellow box is a Komatsu 3000, which sounds like a robot from the Terminator movie franchise. It is in fact a 19ft wide, 1260bhp bucket excavator, with a top speed of 1.5mph. One point five! This fully remote controlled Lego version of the Komatsu 3000 is even slower, and thus can cause no carnage in the office today, much to the disappointment of the Elf that discovered it. It is still worth a look though, as it’s one of the most impressive RC creations we’ve seen in some time. Ayumi is the builder behind it and there’s more to see on Brickshelf here.