Recently, I've started messing around with clay. (Pun unintended)
Apart from allowing you to create any colour imaginable
its also a super sensory experience. Moulding, twisting, stretching, pulling it this way and that, to create any shape and character you can think of.
What I love most about it, is that it make me feel like I'm 12 again. And I can spend hours, exploring my imagination, dredging it for shapes, faces and patterns. All this with a crazed looking in my eyes, giving my co-workers and people around the impression that I've finally lost the plot :)