I discovered ELMER glue.
It works good for me.
And the way it came to me is a little bit funny. A friend of mine living in the USA came back for a month, so I asked her to bring me a bottle to try.
I have received 4 bottles as a birthday gift.
Now she has a birthday. Guess what she received - a thank you pouch.
Another idea to use letters and hearts - I have paper pieced them and added denim fabric around.