Spend the morning visiting Margaret River Chocolate Factory (expensive chocolates but ooh so lovely; the kids get handfuls of chocolate pearls for brunch), Fonti Farm Cheese Factory (we buy a block of cheddar and later discover it is 30% cheaper in the supermarket, sigh). Then lunch at the The Colonial Brewery. It is called Colonial but looks like it was just set up a month ago. We choose the Brewery not because we drink (we don't) but because there is a children's playground on the premise.
Then, after lunch, a drive up north to Dunsborough where we spend about an hour picking shells and playing in the powder-fine sand. The beaches here are gorgeous. Clean. Picture perfect. The air crisp and the sea breeze chilly. We take a scenic drive back and stop by Yallingup (more pictures). The vineyards north of Magaret River Town are by far the most scenic in this area.