Installing a Child Theme is a breeze and just the same as any other (Parent Theme).
Download our Responsive Blog Child Theme. Save file as, don’t open (extract the zip file).
Now that your Child Theme is saved locally (your computer) go to WordPress Dashboard navigate to Appearance > Themes
Navigate to Install Themes
and now click on “upload” link
This is your final step where we are uploading the Child Theme you have previously saved on your computer. Choose file and click on “Upload Now”
Now all we need to do is to activate our Child Theme once the zip file has been uploaded:
All set and this is how to install and activate Responsive Child Theme.