Found this article and thought it interesting here it says that 'young children are being coached in how to play, interact and discover the world around them for 250 minutes a day compared with 25 minutes spent with under-threes in 1975.' That is 4 hours.
I do try and spend lots of time with ds and I do play with him but I also try and make sure he has friends over etc so he get to socialise and I take him out most weekends for walks etc.