The downside of pets and plants — even aquarium fish — is you can’t wrap them as a gift and expect them to live … or go out of town for the holidays and come back to something still alive. Not so with the EcoSphere. Inside each are active microorganisms — shrimp, algae, bacteria — co-existing inside an environment of filtered sea water.  This self-sustaining eco-system only needs some light to thrive for years. With sizes from four inches to nine inches in diameter (and prices as low as $79), there’s a size for every household.

Available at Eco-Sphere.com.