Geomag™ Magnetic Blocks Gems Set, 16 Pieces | Build bright, gem‑like creations with Magnetic Blocks Gems 16. Chunky magnetic blocks with jewel tones invite younger builders to explore stacking, balance and symmetry, while strong magnets keep each tower steady. For Ages 3 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.