Create a product, with optional add-ons

[ELODIE10]

Hi, I have to pivot with COVID, and need some help. I am creating a DIY Box. I would like to add some add-ons (not free) like a whisk or a Bday Card in addition to the boxpurchase.

What I do not like the variant, it will become pretty difficult to read?  What are the best option to add a list of add-ons just below the main product ? a product itself ? 

Thank you very much :https://elodiesnaturals.com/pages/outdoor-classes