Slider Banner in Zerif Theme

Hi Hardeep Asrani

Am using Zerif Lite, i created child theme with reference to http://docs.themeisle.com/article/14-how-to-create-a-child-theme
http://docs.themeisle.com/article/13-replacing-big-title-section-with-an-image-slider
after that i tried to active my child theme, but my child theme folder name not appering in my themes section under Apperance
how can i active exact child theme?