Drop Down Selection

New Member
1 0 0
Can anyone help me with please?
I want to do a Christmas collection box where my customers can select 4 wax melt bars (out of 6 scents) in a box for a set amount. I've added a simple diagram to try and explain, as I'm not sure its possible and I'm really struggling. 
I've created them all as variants already and tried that. But wondered how do I arrange this so they can choose the 4 scents from a drop down to go into ONE box.
Example Shopify.jpg