Simplify the following text for a Grade 6 native English-speaking person.
Original: Dormice can hibernate six months out of the year , or even longer if the weather remains sufficiently cool , sometimes waking for brief periods to eat food they had previously stored nearby .
Simplified: Dormice can hibernate six months out of the year , or even longer if the weather remains cold enough . They sometimes wake for a short amount of time so that they can eat food which they had previously stored nearby .