Marshmallow experiment

Today we have been doing an experiment with marshmallows. First of all the children had a feel and a smell of them

"feels squidgy" "rough" "sticky" "you can twist it" "you can stretch it"

We decided to turn it from a solid to a liquid. To do this we put it in the microwave for 10 seconds.

After 10 seconds they started to melt, we decided to put them back in....

It then turned into a liquid and became very stretchy.

A question: We wonder how long it would take for it to turn back into a solid?