Each egg is filled with slippery-smooth Play-Doh Slime HydroGlitz compound and plastic dino bones. Put together the dino skeleton and fill the dino mold with the 2 colors to make your own triceratops! This dinosaur toy for kids 4 years and up makes a great dino-themed arts and crafts activity or small gift for kids, and also works with the Play-Doh Dino Crew Lava Bones Island playset (sold separately, subject to availability).