Maria's Nostalgic Feelings

Read the following passage:

Every morning, Maria opens her window to let in the fresh air. She enjoys the sound of birds chirping and the sight of the sun rising over the trees. One sunny morning, she noticed a group of children playing outside in the park across the street. They were laughing and running, joyfully enjoying their freedom. Maria smiled, feeling a sense of nostalgia for her own childhood days spent outside.

What can be inferred from the passage about Maria's feelings towards her childhood?