Stair Slide

So I'm out at my folks' house watching my daughter who's still learning to walk down the stairs when the idea for my first million came to me: the StairSlide! It would be the perfect product for 1- to 3-year-olds. Parents wouldn't have to watch so carefully as their child descends the stairs because they'd just slide down! But Google--the ultimate patent clerk--directs me, in a nano- second, to this photo:Some rich London architect beat me to it and made one for his kids. But has it been mass-produced?? Maybe I still have a shot.