Teaching Toys & Tools.
Party Favors & Party Fun. STEM Toys. Quartz, moss agate, carnelian, chrysocalla, fluorite, obsidian, opal, thulite, jasper, amazon stone, amethyst, ulexite, rose quartz, serpentine, onyx, and unakite - All real specimens, and all endlessly fascinating for young minds to explore!. Gems of the USA - Hand-Sized Collection - Party Favors & Party Fun for Ages 3 to 12 - Fat Brain Toys Science & Nature.