The whiteboards in my classroom arent real whiteboards. They are the white panels for bathrooms from the hardware store. So, I used duct tape on the ones on my wall and the ones cut for student use. The duct tape makes it look a little more legit.
To spray paint clothespins (or similar things), clip them onto an old cardboard box and tape the flaps up. they'll dry there and you won't have to worry about waiting for one side to dry at a time. Might use clothes pins for my traffic light next year!
Class Attendance Board--will help you know where students are at all times! Make the numbers pics from the first day of school and the board from a cookie pan from the dollar tree. Keeping track of the kiddies
5 Engineering Challenges with Clothespins, Binder Clips, and Craft Sticks