These self-sustaining EcoSpheres are the coolest and easiest pets you can have. The hand-blown glass containers are closed, balanced, ecosystems, which means they contain everything the shrimp, algae, and microorganisms need to thrive, so you don’t have to do a thing. Today’s $44 price tags on the small sphere and pod are the cheapest these have been all year, and the medium sphere normally sells for $140, but is just $125 today. These would make an interesting gift, and an educational tool for the kiddos.