LEGO 20 (10 Pairs) Yellow Minifigure Hands

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David began designing prosthetic arms from the age of nine and decided to build them with the material he knew best. David was born without a right forearm due to Poland Syndrome, a congenital disease that also prevented his right pectoral muscle from developing. After revealing it at an event held by NASA, David was dubbed "the real-life Tony Stark" by Charlie Wen, who founded and heads up Marvel's Visual Development department alongside Ryan Meinerding. Prosthetic limbs can come in many shapes and sizes; from the classic pirate’s hook, to Anakin Skywalker’s mechno-arm and Jaime Lannister’s solid gold hand. The news of his Guinness World Records title reached the parents of Beknur, an 8-year-old boy who doesn’t have developed limbs.

The proud dad brought media attention to David's story by posting the first video of the MK-I online. The pair have co-written a book, titled Piece by Piece (Pieza a Pieza), which documents their journey together. David's Guinness World Records title was just the beginning - he plans to build more prosthetics, inspire more people and keep helping those in need. He hopes to make the world a more friendly, accepting and tolerant place to live in. Named MK-I (Mark 1), after the suit built by comic-book hero Iron Man, it’s movement was purely mechanical. After much refinement, David’s latest MK-V LEGO® prosthetic arm is motorized, with five fingers that he controls by making subtle movements of his residual arm. It's the most comfortable prosthetic of my models and I don't need to use my muscles to lift something. The servo motors do it for me!" David provides free instructions on how to build the MK-V LEGO® prosthetic arm on his YouTube channel Hand Solo.

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Beknur and his mother traveled 1,300 kilometers, from their home in Strasbourg, France, to Andorra to receive the prosthetic arms from David. David is a bioengineering student and his goal in life is to make prosthetic arms that are affordable and accessible worldwide. David is also telling his story through educational comics for kids and an upcoming documentary, titled MR. HAND SOLO.

In 2017, David Aguilar (Andorra), aka "Hand Solo", created the world’s first functional LEGO® prosthetic arm. I'm thinking about 3D printing PLA or FLEX, honestly that would be a game changer for my prosthetics!" His main goal for the the MK-VI is to be able to move the hand and elbow independently. He’s also planning to build different versions of the existing fingers, to achieve a more natural movement.I would have loved that he had been the recipient of an award for his efforts in helping me to be a normal child like the others."

David is on a one man – and one hand – mission to make his LEGO® prosthetic arms widely available to all those in need. The main challenge David faces when building prosthetic arms is balancing functionality and comfort. My first model isn't motorized, I control it with my muscles and it becomes a bit painful once you spend a long time with it. Good thing is, the MK-I is strong enough to support my weight when performing some push-ups!" Ordinary prosthetic limbs can be expensive, especially when factoring in maintenance and replacement parts. The high costs are prohibitive for many people. LEGO® was my first toy as a kid, it felt that you could build an infinite amount of things. Imagination was the only limit!"