These micro-sized 3D building blocks from Nanoblock are the hottest thing since Lego! With over 260 assorted size and colored pieces (most around .25" long and 1/8" tall), watch in amazement as Air Force One takes shape. Air Force One is the official air traffic control call sign of the aircraft carrying the President of the United States. It also refers to one of the two Boeing VC-25A's that serve as the primary aircraft of the President. When it's finished, it will fit into the palm of your hand! Includes detailed color instructions. Definitely not designed for children under the age of 8 years. The level of difficulty, on a scale of 1 to 5 (5 being the most difficult) we rate this a "2". Challenging and fun for all construction enthusiasts in the family. All you need is a little time and a whole lot of patience!