Things that really stand out for you? Were they with your parents, other kids, siblings, by yourself? What were you doing?
Some of mine are:
sitting by myself under the willow tree in our front garden making designs for cars in chalk on scraps of paper
going for long walks in the woods with my parents
having sleepovers with friends, highlights including bouncing on the bed, 'streaking', and midnight feasts
looking at the stars at night with my dad
running along the beach by myself and exploring all the places around my home on my bike