Answer:
An artΒ-form and its colour-ful result.
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
It can be done to buttons and shopping carts. What is it?
It's tough as nails, Or soft as snow. People use it for their rink, Some just put in their drink.
Sometimes imaginary and sometimes real, sometimes they are the closest and dearest person outside the family. Who are they?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?