It's not so much a "challenge" as it is something to inspire you to be present. Don't let the word "challenge" scare you and prevent you from participating. There's no reward, no punishment -- just an opportunity to be more present.
April photo a day list! Give each of your kids a disposable camera to take everywhere with them in April Take a photo each day in April and at the end of the month print off the pictures and make one big picture of them!