3. Daft Punk Helmet Okay, technically the members of Daft Punk aren't actually robots, but they might as well be. This helmet (and outfit detailed in the link above) is probably one of the coolest things we've ever seen. Clearly, you can't get this done in time for Robot Prom, but we bet if you take the next two weeks off work you can get it done by Halloween.
2. Transformers Triple Feature Soundwave Optimus Prime GrimlockAlmost all of these are created with nothing but cardboard, which makes them some of the cheapest costumes on this list. That said, most required a ludicrous amount of work. It's a good thing the pay-off is incredible, especially with Optimus Prime and Soundwave, which look like toys you could actually play with. Thank goodness they weren't based on those crappy new designs in the movies.
1. Asimo Unfortunately, the instructions for Honda's adorable/creepy Asimo are in Japanese, but it appears most of the costume was constructed out of wood. We'd suggest going with cardboard, with a motorcycle visor for the helmet. Asimo is great for its duel-functionality, not only is it one of the cutest robots to ever grace the real world, it's also exceptionally bizarre and relatively easy to make. We love the little guy and we'd love to see someone outfitted as him out there.