This set of Lego bricks is definitely designed for professional builders. The Lego creator built a scale model of the Sydney Opera House using nearly 3,000 blocks. This set was released by their Lego Creator series in 2013 and is now very expensive to find!

One Lego enthusiast is so keen to spend his time putting the 3,000 pieces together that he'll probably have to pay around $400 for the set! An original sealed box can sell for $500.