thanks to all of you, was able to change settings with image output much to my liking.

http://www.flickr.com/photos/32562673@N07/3941686436/
Used flash because my kid was inside the "tunnel" thing so exposure was not proper othewise

In the pic below i used the A-mode to get the max aperture at the focal length
http://www.flickr.com/photos/32562673@N07/3940907697/

this is also centre weight, 100 which would have come out perfect if i would have changed the autofocus mode
http://www.flickr.com/photos/32562673@N07/3941004933/

in few other pics also i realized that focusing was not apt. Changed the settings to 3D and AF-C. then it came out well.

any other comments would be more than welcome.