It looks a little soft / out of focus. Also you need to move them away from the background so you don't get that harsh shadow.
Firefox add-on FXif used to get the data below
Camera Maker: NIKON CORPORATION
Camera Model: NIKON D3100
Image Date: 2012-03-03 05:13:59 (no TZ)
Focal Length: 52mm (35mm equivalent: 78mm)
Aperture: f/5.6
Exposure Time: 0.025 s (1/40)
ISO equiv: 100
Exposure Bias: none
Metering Mode: Matrix
Exposure: aperture priority (semi-auto)
White Balance: Auto
Flash Fired: No
Orientation: Normal
GPS Coordinate: undefined, undefined
Software: Microsoft Windows Live Photo Gallery14.0.8117.416