DS (20 months) has really started 'pushing it' (sort of) attention wise and I don't know what to do. If he wants a book read, I read it. If he wants to sit on my lap, I let him. But now alot of the time I sit on the sofa and he squeals and squeals and pulls at me until I go into his playroom with him. THen I sit on the floor, and after a minute he wants he to sit next to the toy box/next to him/next to his bricks etc etc. and just tugs and squeals. He used to just do this when he wanted something like a drink, or a toy de-jammed but it's increasing all the time. I don't mind playing with him 24/7, just don't know if I should be saying 'no' yet if he's making me, if that makes sense? It sounds awful but I have resorted to shutting the living room door with some of his toys in here so I can just sit down for 10 minutes (until he squeals/tugs me/pulls at the door handle). What do I do?