I love giving variety in my boxes! I found rope at dollarama and with my dad's help we were able to divide it between 4 boxes. It was alot of rope for $1.00! We walked around the house, well the middle part, a few times:) And I bought a package of clothes pins. So I added 6-7 to each bag. So for $2.00 I could give 4 girls -clothes lines and pins. Or they could use the rope for other things.
And for boys boxes, I like to add bungee cords. My son had this idea and they use them all the time. So why not add it to a boys box.