I have a seven month old DS who is often quite happy to play with his toys on the living room floor by himself, sometimes for up to an hour. AIBU to let him? I'm always in the same room as him, just tidying or reading. If he starts complaining, I get down on the floor and entertain him.
I ask because I'm worried it'll affect his language development, but I've also read it's a good thing if they can occupy themselves sometimes.