Not sure Sarojie .. I'm not usually a "nervous nelly" about giving my birds stuff like that, but .. I never have .. again as others mentioned, the wax coating and ink used is questionable. Mostly that wax coating bugs me.
What about those empty cardboard soda pop cartons I saw in one of your pictures when the girls were there? Those I give to the birds, they LOVE the empty soda pop cartons .. for a free "toy", it can keep them occupied for hours playing in the "tunnel", peeping their heads out thru the holes and such.
I know the soda pop cartons might have some glue, but .. birds aren't really "eating" them, justing playing and shredding .. if I have an empty one, I get the the "stink eye" if they don't get a shot at it, esp. the Cakes .. they will play with one for an entire day .. I put a little hand towel inside, throw some foot toys .. and they're in birdie heaven.