I would pitch it to the interviewer as "I am not a big crafts person. I sometimes have 2 left hands! But I will find people in the company with interesting skills and organize the activities. To have a perfectly organize crafts day (insert organizational spiel and similar stuff you've done in the past). I hope to be an inspirational to everyone who thinks they can't make things. I am no Martha Steward but I try hard, have fun and I think these days could be a great bonding experience for the team."
I like this approach, with a few edits:
"I am really excited about this aspect of the job! While I'm no Martha Steward, I have great organizational skills (insert organizational spiel and similar stuff you've done in the past.) I think these days are a great bonding experience for the team and I've already done some research into fun-filled projects.* Would you please explain a little bit more about the craft days . . ."
I think that putting the emphasis on what a great idea craft day is would be so much better than belittling your own crafting skills.
*I saw your post about "Cards Against Humanity." While I have no clue as to what you meant, the word Humanity jumped out at me.
What about mentioning (during your interview
) a thought of doing crafts for charity? The one thing that pops out in my mind right now is decorating onesies to donate to a woman's shelter . . . The goal here is not only relaxing the team's minds but also engaging the team in community awareness.
Just a thought.
OP -- Good Luck with your interview! Please keep us posted