Nanoblock Architecture - Cinderella&#x27;s Castle (Neuschwanstein Castle) by Kawada. $22.90. Micro-sized building blocks- 1/8th the size of a standard building block. Includes everything you need to create a beautiful Cinderella&#x27;s Castle. Neushwanstein Castle. Nanoblock is a micro sized building block that is just 1.8th the size of a standard building block. The smallest part is a mere 4x4x5mm!  Double ridged backing makes the small size possible. Despite its micro size, Nanoblock is...