So, this is a question from daughter, a science geekShe needs to know, if medal, wood, plastic, or glass, would be that hottestShe'll experiment after that first answer comes! So please, it's a easy question, I know it, but.I want my kid to solve itThanks!
If you are reporting accurately, then no, water color used for painting pictures will wash right outIf she provided you with water based paint that dries to permanent, like latex or acrylic paints, then yes it will stay on - but dying fabric usually involved dipping in, not painting on, so what she gave you probably won't work for dying a shirt.
Assuming they are the same mass, then the metal will heat up fastest, The thermal conductivities of ceramics (glass) and polymers (wood, plastic) fall into similar ranges, so without knowing the specific composition, it is impossible to rank your list further.