You could use a talking scale. It would require measuring liquids and such by weight but that could also be used to teach the kids about conversions.

As much as all the suggestions in this thread are good ones, I would like to ad that blind people are just naturally more tactile, even when we're doing our best to avoid it. Unfortunately, some blind folks I know were just never taught proper hand washing technique. Waving your hands under the hot water tap for 10 seconds while holding a bar of soap doesn't cut it! Seriously, no matter if the person is cooking for himself, or for someone else, when you're blind, washing your hands matters. Do it $1, and do it frequently. If you need to touch something that isn't food (a braille recipe, your phone to set a timer, random stuff in the cupboard while you're searching for something, whatever), you need to wash your hands right away before touching any food, dishes, measuring spoons, etc. People who can see just touch a lot fewer things in the course of cooking than blind people do.

I use large syringes for oils when I bake. For thin liquids like milk and water, I can usually hear when it reaches the top of the measuring cup. You can try something like a plastic bobber that would float on the top of the liquid as it rises.

The buzzer you are referring to is called a liquid level indicator.

You can also use measuring spoons. Cut notches into the handle or use fabric paint to leave raised dots to indicate the size (I think people usually use one dot/notch for 1 cup, two for half a cup (1/2), three for a third of a cup (1/3) and four for a fourth of a cup (1/4)).


There is also a talking liquid measuring cup, but that is a bit more expensive.

https://www.maxiaids.com/speaks-volumz-talking-3-cup-measuring-cup


One method to check if a cupcake is baked properly is to insert a toothpick. If it feels like liquid, not baked enough. If it sticks into it, baked solid-ish. (I don't know the specifics on that one).

One of my clients, to make sure things were cooked thoroughly, used to let things sit on the frying pan until the fire alarm went off. I strongly recommend against that method. :O