Enjoy hours of fun and learning with the Toysmith Smashable Geodes Kit. Gently crack open these real geodes to reveal the crystal surprise within. Discover hidden treasure within the unassuming rock exterior. Filled with glistening crystals, the cracked-open geodes make a fine keepsake for a book shelf or desk top. Learn about crystal formation and geology with these easy-to-open geodes. This set is recommended for ages 5 and up with adult supervision.