A dose is like the perfect amount of chocolate chips in a cookie. If you have too few, the cookie might taste a bit plain. But if you have too many, it could be too sweet or even messy. So, a dose is just the right amount of something, like medicine, to make sure it works just right without being too much or too little.
Think of a dose like the right amount of water for a plant. If you give the plant too little water, it might get thirsty and droopy. But if you give it too much, it might drown and not be happy. A dose is the right amount of water to keep the plant healthy and growing.
A dose is also like the amount of sunshine you need to feel good. If you stay in the sun too long, you might get a sunburn. But if you don’t get enough sunshine, you might feel a bit gloomy. So, a dose of sunshine is just enough to make you feel happy and bright without getting too much.