An easy but time consuming wedding favor to give is a bag of chocolate.
Buy some chocolate of your choice, chocolate molds, a small paint brush, and food coloring for white chocolate.
You can paint the molds with the white chocolate and pour regular chocolate on top of it. When it cools the chocolate pops out. If painting the molds is too time consuming for you, just pour chocalate in the molds or make a party out of it with friends/family.
You can buy different kinds of bags online for pretty cheap.