Which fish are easy to take care of,there frys can be with the adults,can be in a 10 gallon tank without ?

Maybe a few cherry shrimp will do, but im not so sure if they'll do well without your heater, unless you keep your house warm.br
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Zebra danios wont do well in a 10 gallon. They swim around a lot, like race horses on crack. They need atleast 20 gallon, preferably, more. Same with wcmm. Just buy a cheap heater for the fish tank with the money you were gonna use to buy the danios/minnows.