You don't have to be an engineer to create with nanoblock! With these micro-sized building blocks, 3D buildings are constructed like never before! Watch in amazement as buildings are erected to even the tiniest detail. Germany's Castle Neuschwanstein is an example of 19th century Romantic architecture. Watch as it take shapes beneath your hands with over 550 assorted size pieces. Finished size: 3 x 3 x 3. Includes detailed color instructions. Not designed for children under age 8.