Dinosaur week: Fun & Simple dinosaur activity for kids! Maybe for older kids give each shape a numerical value and have them add how much their dino is worth. Can use with class to compare/contrast amounts, etc.
DIY ABC Tree from Blissful Roots.I'm thinking drip pan attached to the play room wall. The tree branches can be painted on and then the alphabets could be large safe magnets. That way the children could make the tree over and over again.
This is one of the cutest Letter craft sites I have found! Both Upper Case and Lower Case letters are crafted and the website explains in detail how to duplicate them. Very nice site called Totally Tots.