gate for the stairs...

I have a 2 year old and the stairs scare me so much him falling and getting hurt at my parents house when we go they don't have carpet either and the stairs go straight down so if he fell it's very dangerous ..I'm looking for something that's easy to put on and put away when I go over which is every weekend please include a pic and price if u can..I use to be behind him at all times now I have a newborn and can't chase him at all times.