So DS is 4 months, and for the last few weeks he has been having several times a day where he is just irritable no matter what I try and do, read to him, play, etc. so I will put him in his cot, and he will lay there playing with his toys, rolling around, talking to himself. Most of the time he ends up falling asleep. If he doesn't and starts to get crabby again I pick him up and we play again. I do this probably 3 - 4 times a day. I just feel bad him being in there alone even though he is quite happy, I guess I feel guilty I should be stimulating him not leaving him alone. What do you think, should I try something else or is this ok?