These Lego building sets are great toys!! I ordered this one next day and it came fast and on time for my son's birthday. My ten year old loves to build these!! If you have a child who likes to build things this is the toy to get. My daughters also love these so great for boys and girls!! It is a smart toy that makes kids use their hands, follow directions and exercise perseverance. It will take him a few days to get this built and definitely worth the effort.
One of the most anticipated tests of the crane is its lifting capacity. LEGO Technic cranes have never been among the best top-lifters; the second biggest LEGO Technic crane, 42009 Mobile Crane Mk II could only lift about 500 grams/1.1 lbs of cargo. Surprisingly enough, the new mobile crane is capable of lifting twice as much. We managed to make it lift up to 1.1 kg/2.4 lbs of Pepsi cans before the winch mechanism started to give up. Loading the crane with heavier cargo can result in severe damages to the turntable mechanism, so we won’t recommend pushing it to the limits.
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This is a monster of a LEGO Technic kit and once fully constructed will sit pride of place in the center of any collection. At 3929 pieces, this is definitely for older kids and adults and LEGO suggests it is best for the 12-16 age range. See some gifts for 11 year old boys. It can also be rebuilt into a Mobile Aggregate Processing Plant, giving this kit 2-in-1 functionality.

The programmable Lego brick which is at the heart of these robotics sets has undergone several updates and redesigns, with the latest being called the 'EV3' brick, being sold under the name of Lego Mindstorms EV3. The set includes sensors that detect touch, light, sound and ultrasonic waves, with several others being sold separately, including an RFID reader.[52]

In 1989, the LEGO pneumatic line was revamped, and a new cylinder and pump piece were introduced. The old cylinders and pumps were discontinued. The chief difference is that the new cylinder had two input valves now, which allowed both pushing and pulling without needing complex circuits involving the distribution block piece. The Generation 2 cylinders also had metal rods so that they more closely resembled real hydraulic cylinders.