Please follow the below method if you want to change the default header layout style.
Login to your site, Navigate to Appearance > Kidsworld Options > Layout > Header here you can change the header layout as per your need.
Make sure that you have not assigned the header type under the corresponding edit page. If, you have assigned the header type other than default then it will overwrite the Buddha Panel option. So, when you have changed the layout in Buddha Panel it dose not reflect on your page.