This is a math center activity that my kids love! We use it to practice adding. Simply print (laminate if you want), cut apart, and it's all ready to go! The kids solve the addition problem and clip a clothespin to the correct answer. I usally put a smiley face on the back of the right answer so that they can check themselves.
I also have a Spring Addition Clip-it pack and a full pack of addition clip its that has monsters, sea creatures, spring animals, and other animals.