What would i do if i had an extra day to change the world

If i had a day to change the world I would ……
Hold a bake sale and give all the money I raised and give it all to cancer reasearch because so many people die of cancer.
or
Feed the homeless something warm and make thewm feel just as important as everbody else and make them feel special.
or
Clear up all the litter on the street, or floor to make the world a better cleaner place for us.
or
Do all the chores around the house and let my mum relax and put her feet up and not have to worry about anything.
I remember that the smallest things make the biggest difference and even though my thoughts are just a grain of sand in the dessert but to someone else it could mean the whole world to them!!