ipad guided access – YouTube
Guided Access allows you to open an application on the iPad and stop children quoting it to open another. This might be handy if you want a group of children to take turns on one application.

ipad making a website bookmark – YouTube

You can add bookmarks to Web sites to your iPad home screen.

This allows children to open Web sites without having to remember or type an address.

You could create a folder and put a set of related bookmarks inside.