giggle

collapse into, dissolve into, get ~s

The children dissolved into giggles when the clown tripped over his oversized shoes.

stifle, suppress

She tried to suppress her giggle when the teacher tripped over the chair leg.

with a ~

She answered his question with a giggle, clearly embarrassed by the compliment.

~ about/at

The children couldn't stop giggling at the silly faces their uncle was making.

helplessly, hysterically, nervously

The nervous students giggled helplessly during the difficult exam.

about

The children couldn't stop giggling about the silly jokes at the birthday party.

at

The children giggled at the funny faces their teacher made during the lesson.

over

The children couldn't stop giggling over the silly jokes in their comic books.

with

The teenagers couldn't stop giggling with laughter during the funny movie.