This is a great way to post the alphabet in your classroom. This website also has a ton of wonderful ways to teach the alphabet. This meets standard command of the conventions of standard English grammar and usage when writing or speaking.
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.