Childs
Children

Answer

Children

Explanation:
The word ‘child’ is an irregular noun, so its plural is ‘children’, not ‘childs’.

Regular plurals usually add -s or -es (like book → books, box → boxes).

But some words have special plural forms: man → men,
woman → women,
tooth → teeth,
child → children.

So, ‘children’ is the correct plural of ‘child’!