penny: since you were about 18 months old, you could easily be entertained for hours with just a bit of sidewalk chalk and a bowl of water. dry chalk hardly interests you in the least, but when the mess factor is upped with the addition of water you enter what has now been coined your "rainbow world". a place where time and space no longer exists for you. you sing, you create elaborate story plots, get as messy as possible, and you're basically just 100% in a land of your own making. it's pretty awesome to watch.