Please heed the above advice. Do not let this poor kitten suffer another minute. Do the right thing.
Oh for heavens sakes lady, your kitten is seriously injured, if it's still alive by the time you read this please take it to a Vet ASAP....you'll not be able to help this kitten on the internet.....and I beg you not to bring anymore animals into your home until your child is old enough to learn how to handle them properly and not injure them...