The original wooden rainbow stackers by Grimm’s. Brighten up playtime with this colorful wooden rainbow stacker. Perfect for imaginative play and learning. Durable and safe for kids. Bought new 5 or so years ago and paid $100. Has signs of use as shown in pics but still has a ton of life left. A few black lines are present around the center of each grain. These lines are present on the first 5 larger pieces (from red to light green) but absent on the smaller pieces (from green on). Not really a crack as I can’t feel it. I just did a quick research and apparently they are called medullary rays (see the last pic). Size: length 35.5-36.5 cm, height 17-18cm