Foreign building blocks I purchased a few years ago. It's a multi-colored stone block set, an educational toy that fosters creativity. The box is torn, but the blocks themselves have no noticeable stains. They have a good weight to them, and are a rare find in Japan! - Product Name: Anker Stone Building Set - Colors: Red, Blue, Green, Yellow - Type: Block Toy - Features: Multi-colored stone block set Thank you for looking.