>> Mummy, how many baby Cthulhus are there?<<

None. Cthulhu is a cephalopod. They die after breeding.

>> Mummy, why does Cthulhu like killin' people? <<

It is hungry.

>> Mummy, are there any nice Cthulhus? <<

As there is only one, no.

Well, not in that 'verse. siliconshaman and I came up with a quite different version.

>> Mummy, why does Cthulhu want to rule the universe? <<

Because it's there?

>> Mummy, how was Cthulhu born? <<

Once upon a time, some radiation got into the ocean ...

>> Mummy, since Cthulhu lives in the sea, is he friends with the sharks? <<

Yep. Just like clownfish and anemones are friends. Scraps.

>>Mummy, why does Cthulhu have wings if he spends all his time in the ocean?<<

See above re: radiation.