Model different organic and inorganic compounds with this large set suitable for use by an entire class. Set includes 150 connecting lugs and 370 colored balls, and a molded storage box with compartments. SMALL PARTS: NOT FOR CHILDREN UNDER 3 YRS. Contents: Carbon (Black) . . . . . . . . . . . . . 60 Hydrogen (White) . . . . . . . . . . 125 Oxygen (Red) . . . . . . . . . . . . . . 30 Halogen (Green) . . . . . . . . . . . 25 Metal (Yellow) . . . . . . . . . . . . . . 20 Monovalent Metals (Orange) . 20 Divalent Metals (Orange) . . . . . 30 Trivalent Metals (Yellow) . . . . . . 30 Non-Metals (Blue) . . . . . . . . . . . 30 Bonds . . . . . . . . . . . . . . . . . . . 150