# Is blowing up a balloon a great analogy for Avogadro's Law?

Hello,
I was learning about Avogadro's Law and trying to find some real-life example of it. It mainly states that:

For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

So let's say I have a balloon with X moles of air inside it which take up volume V. Then I pump it and add more air which result in the balloon having 2X moles and taking up volume 2V right? I think that the pressure is constant since it must adjust to the pressure of surroundings but I'm not sure about the temperature. So is it a good example to build up some intuition about the law or I misinterpreted something?