To enable this, create a smart collection named All Products and set the condition to 'Product price is greater than 0'. You can create a collection through the 'Collections' menu in Shopify admin. Or you can turn this section off through theme settings.
Customise your own mixed bag Pick N Mix by simply clicking on your chosen items, up to a max of 10. If you select just one item you will receive 1KG of the candy selected.