ok, i have to make a 500 word essay on something about the brain. any ideas? My first topic was "Sleep and Dreams", and i made a 630 word essay on that, but it didnt sound good. any new ideas?

When i was four years old, my dad and i a tree in our front yard. it was a tiny, fragile sapling. he promised me that it would grow tall and strong, but he said that i had to be patient. until i turned 18 years old, dad and i it every year on my birthday. choose the words that correctly fill in the blanks.