How about a big tactile egg timer that makes a noise when time is up and can be set to 20 or 30 minutes? It could be semi-transparent with a RGB LED inside tha

How about a big tactile egg timer that makes a noise when time is up and can be set to 20 or 30 minutes? It could be semi-transparent with a RGB LED inside that moves from white to red over the last five minutes on the timer. Push the top to cycle a few different set tasks (indicated by led-color?), wind up to start. Power and data over USB? I need to save up for a new 3d printer and build this for myself.