The children in art class experience what it's like to draw with their feet and mouths (and elbows! This is not only a fun, action art experience, but it gives them a new appreciation and gratefulness for their hands.
Montessori Nuts and Bolts Board: DIY and Lesson Plans
Math wall---"How Tall am I?" Flower Sprouts with the kids' names on the flowers. This would be great as a beginning and end of the year activity! I can just imagine how much the kids would giggle over their comparisons :-)