Go to a library and find the book you loved when you were eight

Nostalgia

Build something out of blocks or Legos

Nostalgia

Bake an after school treat you loved in elementary school

Nostalgia

Put some clips, ribbons, or flowers in your hair

Nostalgia

Go to a playground and swing

Nostalgia

Blow bubbles

Nostalgia

Dig out an old photo album and go through the whole thing