Answered: 1 Feb 2006 at 2:48:23 AM
Dear Brenda,
As far as feng shui is concerned, we are concerned with the flow of Qi and as posters on the wall do not affect qi flow, you may put there what you like.
To enhance feng shui in your children's rooms, you will need to make sure that they are sleeping in a good room with regard to the House Gua and preferably facing their own personal good direction.
Regards
Di