one cool/special/no cost thing to do

.... every day. when asked how long she had, my mom used to say "i have as long as you have, i have today. what are you going to do with your today?" so i'm taking that to heart lately. my goal is to find one cool/special/no cost thing to do every day. it can be the simplest thing like coloring and finger painting, to the most extreme.... which is what i'm looking for. but... it has to fill the above criteria. and, i have to be able to take a two year old along for the ride. any ideas???