Check out the picture above. Do you believe these wood blocks are building blocks sets? but they are indeed building blocks sets, which are called Beetle Blocks manufactured by Little House. These blocks are made from Ponderosa Pines of Western Canada, which is destroyed by a species of bark beetle.
You can purchase Beetle Blocks for $50 USD at TrunkShow, alternatively pick some waste woods and make your own building blocks according to the shape of Beetle Blocks.