Nanoblock - Pok Mon - Mewtwo Deluxe Edition, Pok Mon Series Building KitMewtwo from Nanoblock's Deluxe Pok mon Series stands approximately 5. 5'' tall and has 620 pieces. Difficulty: Based on a scale from 1 to 5: 1 being the easiest and 5 being most advanced, this model is based at a Level 3 (entry level) and is for ages 12+. With bricks as small as 4mmx5mm and manufactured to the highest tolerances for a perfect fit, make amazing 3D art that fits in the palm of your hand. All sets come with detailed step by step