Converting Select to Table Multi Select

Hello I’m trying to convert a select list of values say Happy, Pleased, Content, delighted, angry, sad so that my users can enter multiple values. IE convert from a field in the contacts to a grid. I’ve created the doc type and then child table and added that to my doc type BUT I can’t work out how I need to create this lookup first? Effectively I need to create the field as a separate stand alone doctype and then chose from it. I did that, but it’s added the ID to the front of the table and so chooses that, not the value of the Selects within the table… I’m nearly there but what am I still getting wrong? Thanks