Fossils
Who needs an aquarium when you can be surrounded with sea creature fossils and bypass that funk smell of the tank when it needs cleaning? Ancient water-dwelling Mosasaurus teeth, Shark teeth, Knightia fish, Orthoceras, Ammonites, and Petrified Bogwood are as cool as any living animal you can keep in a box. Create a rich environment with nature’s history preserved in items like Coprolites, Dinosaur Bones and Petrified Wood.
Include a book about fossils with your gift and give the gift that keeps on giving!