Visuals for Self Regulation

One of my high school teachers for students with autism has tons of visuals all around her room, to help students identify and communicate their internal states and needs:

Teachers Pay Teachers is the place to go for visuals! 
Bin also contains some favorite fidgets and visual toys.

And, lots of cool activities and environmental aids for self regulation:

Mulch-ish dirt--very little scent.

Water table on wheels

Softest sand you ever felt.

Making those glaring lights more bearable.