Anchor Stone 4 - Home >>> Building Blocks >>> Anchor Stone /!\ Warning: CHOKING HAZARD -Small Parts. Not for Children Under 3 years. Anchor Stones (Anker Steinbaukasten) are high quality sets of stone building blocks for child and grown-up alike. Set #4 is a beginning set. It comes with 55 stone blocks, a booklet with different structures, all which can be built with this set and a wooden box with a sliding lid for storage. When combined with set #4a, you have all the stones from set #6. more info... Recommended for 13 years and up. Made in Germany.