Can anyone teach me how to juggle?

I want to know how to juggle my pets, but they keep squirming. I already know how to juggle tennis balls, and now that's boooooring. I keep trying to juggle my goldfish, but they don't stop jigglin about. I have already smashed two of them on the floor, another one of them had it's fin mangled, and a third had his eye poked out by the fall. I am down to my last five goldfish, my fish tank is looking empty, and if I can't learn to juggle them, their lives will have been in vain. please help :)