In the lab: I made a special piece of kit that lets me turn an electronic device on (a solar panel or a light emitting diode) and then look at the individual devices whilst they are on. It’s called looking at something ‘in situ’- you are running a little current through the device- like turning on a light- and you can look at individual molecules in the light. It lets us make sure we know which ones are working and which ones aren’t doing their job properly. Then we take it back to another lab and try to make it better.
In the kitchen: when I make chicken stock from bones (you roast a chicken, have a delicious dinner, then use the bones to make a soup which you use as the base for other dishes!) I freeze it in an ice tray. then when I need some chicken stock I just pop a few frozen cubes in! It means I have homemade chicken stock whenever I want!