The definitive shape of the Lego bricks, with the inner tubes, was patented by the Lego Group in 1958.[15][56] Several competitors have attempted to take advantage of Lego's popularity by producing blocks of similar dimensions, and advertising them as being compatible with Lego bricks. In 2002, Lego sued the CoCo Toy Company in Beijing for copyright infringement over its "Coko bricks" product. CoCo was ordered to cease manufacture of the products, publish a formal apology and pay damages.[57] Lego sued the English company Best-Lock Construction Toys in German courts in 2004[58] and 2009;[59] the Federal Patent Court of Germany denied Lego trademark protection for the shape of its bricks for the latter case.[60] In 2005, the Lego Company sued Canadian company Mega Bloks for trademark violation, but the Supreme Court of Canada upheld Mega Bloks' rights to sell their product.[61] In 2010, the European Court of Justice ruled that the eight-peg design of the original Lego brick "merely performs a technical function [and] cannot be registered as a trademark."[62]
Billund Airport had its beginning in 1961 when the son of the founder of the Lego Group, Godtfred Kirk Christiansen, established a private 800-meter long runway and hangar north of his factory in Billund. With Christiansen as a key driver, more of the neighbouring municipalities were included in the group of owners, and it was planned that the airport should be expanded to a regular public airport.
This set has essentially all that's needed for airplane-related play: the plane, an airport terminal, and a service vehicle. And each part of the set is quite detailed. The plane feature a galley and a toilet; the service vehicle has stairs, a baggage trailer, etc; and the terminal has revolving doors, security check, and a baggage conveyor belt. The building process is also well planned out and documented. The child is eased into building by starting out with the service vehicle, then comes the plane, and last the terminal, which can be challenging.
Play out real-life scenarios in LEGO DUPLO Town: a recognizable world with modern DUPLO figures. Help your little pilot get ready for take-off at the LEGO DUPLO Airport! It's easy for preschoolers to build the boarding gate, luggage slide and revolving air traffic control tower. Makes an ideal gift for preschool children. Contains 29 pieces. Airport measures over 8 (22cm) high, 5 (14cm) wide and 4 (11cm) deep. Plane measures over 3 (9cm) high, 7 (18cm) long and 6 (17cm) wide.
I cannot stress just how much I love this item, it may well be the highlight of the whole set. LEGO have released bi-planes before of similar design, but it still something to marvel over. Harking back to those older days of LEGO relying on imagination and not movie franchises, this is what we had to play with, and it is great to be able to relive that in today’s world.
The construction of the new airport was carried out during 1964 and the airport opened on 1 November, with one runway at 1660 meters in length and 45 meters width, a small platform where aircraft could be served, and a control tower to the controller. Hans Erik Christensen, the former chief pilot at LEGO became director, and the passengers were handled in LEGO's hangar until the first terminal building was opened in the spring of 1966. The airport was continuously expanded the following years, with new facilities, terminal buildings, lounge, tax-free area and hangars where LC Johansen's studio often participated as an architect (today called the Johannsen Architects), while other work was carried out by the airport's own studio.
The main wings are made up of a pair of white 10 x 10 wedge plates with cut corner and no studs in the centre; these are rare, having only previously appeared in two sets in this colour. The red 1 x 1 plate with tooth on each wing tip is also uncommon, having appeared in less than ten sets to date. The sides of the cockpit are made up of stickered red 1 x 4 x 1 panels, and it definitely helps if you concentrate when you apply the stickers, which I clearly didn’t as you can see in the picture below…. The area behind the cockpit canopy is nicely contoured by a red 4 x 4 triple wedge which, I was surprised to discover, has only previously appeared in a single set in this colour. Not to be outdone, however, the large 12 x 2 x 5 tail is appearing for the very first time in red. The hinged trans-black cockpit canopy is yet another rare element, appearing here for only the second time ever; rare it might be, but its pronounced curvature unfortunately means that it somewhat spoils the hitherto sleek lines of the jet. The flipside of this, however, is that the cockpit can comfortably accommodate the pilot.

Since around 2000, the Lego Group has been promoting "Lego Serious Play", a form of business consultancy fostering creative thinking, in which team members build metaphors of their organizational identities and experiences using Lego bricks. Participants work through imaginary scenarios using visual three-dimensional Lego constructions, imaginatively exploring possibilities in a serious form of play.[73]