The science kit includes 15 round Moroccan GeodesNatural Moroccan Geodes can be opened into two hemispheres by just hitting them with a hammer. Don't use too much force, otherwise they will break into many small piecesAll Moroccan Geodes are hollow transparent crystals, sparkling, and each one has a different appearance and internal structureOpen the Moroccan Geodes and drop your favorite liquid pigment into them. It will automatically penetrate into every gap and turn into the color you wantVery beautiful decorations, you can put them in the living room, desk, fish tank decoration, etc., suitable for scientific education, geographical research, birthdays, Christmas and other festivals gifts