Step 1 : Open your image in Photoshop and duplicate it by clicking Ctrl+j. Now go to the duplicated layer and name it (mine I named as Kids layer), from now on you will work on this layer.
Step2 : Right Click the Adjustment Icon which is lying under the Layer panel and Select the "Black & White".


Step 4 : Select the Eraser Tool from Right side Pane, Mode - Brush, Opacity -100 % , Flow 100 %
Step 5: Erase the "Black & White" image whereever you want to make them color. Then you will get the Different mode of Image with the Good effect.
Enjoy !!!!!!!!
Step2 : Right Click the Adjustment Icon which is lying under the Layer panel and Select the "Black & White".


Step 3 : Then the Image will become Black & white color as shown as below image
Step 5: Erase the "Black & White" image whereever you want to make them color. Then you will get the Different mode of Image with the Good effect.
Enjoy !!!!!!!!