1) Create a child product and make sure to designate it as child in dap admin -> credit store -> storefront settings page.
2) Also make sure to set ‘allow users to redeem individual content’ to yes for the child product in credit store -> storefront settings page.
3) Add all the content that belongs to the child in dap products page -> content responder tab.
Make sure to add the right number of credits to each content that you add.
4) Now when you go to the store, you should find all the content under the same child and users can redeem access to individual content.