Terminal Health

This little gadget worked well today in the shop, but that's not why I blipped it. I'm on a course looking at everyday objects from a different angle. Critique welcomed.

This is a child's eye view of my credit card terminal.

At this point the child has it's wet, sticky mouth around the glass edge of the display cabinet. Teeth are clinking against the front and top panes. Is it the flavour of glass cleaner, something that a previous child had been eating (no, I don't want to go there!) or is it simply the warmth against the tongue of the hot glass, kept lovely and warm by the cabinet lamps?
A perfect incubator!

How come the mums never notice?