helium
helium balloons for the children's party

water
colourful/colorful
party

blow up, inflate
burst, pop
tie
They tied the balloons to the back of the car.

burst, pop

barrage, hot-air, weather

go up in
We went up in a balloon.

launch, release

float by, float over, float up

flight
race

in a balloon
She crossed the Atlantic in a hot-air balloon.