To use this Nanoblock set, start by laying out all the blocks and following the detailed step - by - step instructions that come with the set. You can assemble the cute Hello Kitty figure at your own pace. When handling the blocks, be careful as they are very small and can be easily lost. If you accidentally drop them, look around carefully to find all the pieces. To maintain your Nanoblock creation, keep it in a dry and clean place. Avoid touching it with dirty hands to prevent staining. If it gets dusty, you can gently blow on it or use a soft, dry brush to clean it.