The GreenJoy Aquarium Thematic-Decorations Fish Tank Dinosaur Accessories – Aquarium Decor Kit with Plastic Plants and Ornament (12-20 gallons) is a great way to add some fun to your fish tank. This kit includes 15 packs of assorted plastic plants and animals that can be used to create a variety of themed environments. The plants are heavy enough to stand under water, and the animals are made of safe and soft plastic material.