How to make a loop on your crochet toy:

Attach black yarn (or any other color you like)  trough the bottom of the body leaving a long tail. 

 

Pull it trough the top of  the head and then back, leaving a small loop. 

 

 

Then pull it back trough the same hole:

Then  make a chain as long as twice the toy. 

The loop has to be as long as the toy itself can pass through it, which allows you to tie it to your bag easily.

 

(the ugly bunny bag charm on the picture is not my own pattern. Find it  here)

 Then leave a long tail so you can pull that tail back trough the same hole you pulled it from the beginning (from the top of the head trough the bottom of the body).

And tie the two tails together. 

 

Then hide it in the toy. 

Now you have a brand new bag charm! Easy, isn't it?!  :)

P.S You can make the loop smaller and with the color of the hair then add a  key holder