Activity for Jennifer

I started to tie ribbon to the neck of a Mason jar a few weeks ago, but was told it was too soon and the bow would be flat. The ribbon is unwired satin... any thoughts?? Wedding is now in 3 weeks and I don't want to wait til last minute to put...

I am expecting about 250 guests. We are serving a buffet meal so I am wondering how many cake servings/party favors/sparklers for exit to order?? Any suggestions would be appreciated!