Here's a head I built (but ultimately decided against) for a robot I'm working on. It's a little too goofy looking for what I've got in mind but still worth sharing I think. The main idea I'm interested in here are the lips made from ribbed hose. I trimmed it down (one of the few types of pieces I am okay with cutting!) to two ribs and when it's flattened down it ends up looking kinda like a mouth. The lipstick as rosy cheeks was an afterthought but it made me laugh so I left it in there.