LEGOMindstorms NXT 2.0 (8547)

I first encountered the MINDSTORMS series in 2001 when I bought the Robotics Invention System 1.5 out of curiosity. Since then, I've purchased and used numerous MINDSTORMS sets, written two MINDSTORMS books, developed and taught a LEGO robotics course, and given LEGO presentations. So when I heard that LEGO was releasing the NXT 2.0 set in summer/fall 2009, I was curious to discover how LEGO would improve its flagship product. After finally getting my hands on a 2.0 set, I've been busy building, programming, and analyzing the kit's features. And I think this is the best MINDSTORMS set to date.The original NXT set released in 2006 (I'll call it the "1.0 set") enjoyed enormous success but still had some shortcomings. The NXT 2.0 set addresses some of those flaws and really is everything the 1.0 set should have been. As a robotics kit, the NXT 2.0 set mainly involves building and programming, so I'll take a look at how the kit performs in each of these areas.First, the building experience is fun and challenging while offering some exciting new additions. For the electronic elements, the NXT microcomputer and servo motors remain the same in both design and quantity; however, the selection of sensors has changed. There are now two touch sensors, an ultrasonic (distance) sensor, and the color sensor. The new color sensor boasts three functionalities. It can detect colors (6 basic colors), measure light intensity, and act as a lamp (emitting a red, blue, or green light). Unlike the 1.0 set, there is no light sensor or sound sensor: the new color sensor can function as a light sensor, and LEGO apparently thought that having two touch sensors would be more useful than having one touch sensor and one sound sensor as in the 1.0 set. I agree.The building elements are, once again, studless LEGO TECHINC pieces rather than traditional bricks. The 1.0 set included a few TECHNIC bricks, but these are gone in the 2.0 set, which focuses entirely on studless construction. Overall, there is still a good selection of beams, pegs, and axles (including a new #9 length axle) as well as the addition of two small rubber bands. Also fun is the special ball shooter equipment along with 12 small, brightly colored balls.There are only a few gears included, though. Whereas the 1.0 set included a fairly good variety and quantity of gears, the 2.0 set includes only a handful of double bevel gears and a single 12t bevel gear. This is a bit disappointing but also understandable. People like to add lots of gears to their robots to make them look cool, but lots of gears introduce lots of friction. The 2.0 kit's sample robot designs demonstrate how to connect pieces directly to motors rather than using gears to transmit the motion. This works fine and takes a little bit of getting used to, but I would still encourage new LEGO users to expand their collection of gears after purchasing the 2.0 set.As for the programming, the 2.0 version of the included NXT-G software offers some welcome new features. A remote control, sound editor, image editor, new programming blocks, improved performance, and other features make programming a more enjoyable experience. Performance is noticeably better than in the 1.0 version but can still be sluggish.The software includes a number of fun challenges spread across four robot designs: Shooterbot, Robogator, Color Sorter, and Alpha Rex. The sample robots are durable and work well, although some of the instructions for using Color Sorter were a bit confusing. The new version of Alpha-Rex is a truly fascinating robot: in addition to being a fun "advanced" model to build, new users can learn a lot from its incredibly compact and elegant design.The NXT 2.0 set is leading the MINDSTORMS series in the right direction. I like what I see in this set, and I believe LEGO has a winner on its hands. The 2.0 set is more expensive than the 1.0 set--by $30--but I believe the improvements and added functionality justify the extra cost. In sum, the NXT 2.0 set is a great toolset for any robotics enthusiast and a must-have for MINDSTORMS fans.

I design equipment control's for a living, so I'm fairly adept at these types of embedded processors. Purchasing the NXT kit only seemed a natural way for me to spend more time with my two boys (12 and 9) and sneak in some education at the same time.The Good:> This is an awesome idea by Lego - a toy that can be reused over, and over, and over again and is only limited by the imagination.> It really is a good tool to teach your child the fundamentals of programming.> The software (by Labview) is well done and about as easy as it can be made to be.> The parts are compatible with other Lego products - greatly expanding the capabilities.> It really does lend itself to parent/child together time.The Challenges:(Note that I say challenges, because I would really say that there is anything bad about the product.> If you've never programmed before, you have to expect that there will be a learning curve. Don't expect to be doing anything you can imagine right away.> It really feels to me like a starter kit. Most things that we want it to do, there are simply not enough parts for. For example, a fourth motor would be really useful as well as a third button and an analog input device (an input that varies in value instead of off/on - like a light dimmer). To really make this fun, I think that you either need two of them, or find a friend with one.> You have to find clever ways to attach to the motors and the 'brain' in order to build a stable structure. I know of lots of regular lego parts that could have been included to make this easier.Summary:The Mindstorm is a great product that lends itself to quality parent/child time. The experience is enhanced by a combination of a technically savoy parent and an inventive child. You'll find yourself thinking and building all kinds of interesting devices together.To keep it from going into a closet after the first month, though, you need to plan on further investment. It is a starter kit, and needs further parts to make it really useful. Consider getting together with friends or joining a club.SteveJ

Got this at Xmas, son is 13 and sorta of the geeky type of kid but he wanted one. This is a cool toy if your child is going to use it. My son gets fustrated and quits. He did manage to build the robot n make it walk and a couple of other things but that required me pestering him. Lots of small parts to lose and break (havent yet - knock on wood). Its an expensive dust collector now.