Two house sparrow eggs found! Not cracked. Help.?

i found two house sparrow eggs that fell from their nest in a storm, they aren’t cracked or harmer at all, and the eggs that did break were still yolks so they weren’t alive just yet. i made an incubator (found it online) and have had them in there for a week so far. they seemed to have changed a bit but nothing... show more i found two house sparrow eggs that fell from their nest in a storm, they aren’t cracked or harmer at all, and the eggs that did break were still yolks so they weren’t alive just yet. i made an incubator (found it online) and have had them in there for a week so far. they seemed to have changed a bit but nothing huge yet. how do i tell if they’re alive? should i give up on them? help :(
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