Mine loved it, but they slept on their tummies, so they were very comfortable in that position.
Don't push it. Several times a day, put him on his tummy and you get on the floor in front of him with some toys. Talk to him, play with him, make games with him. Start maybe showing him how to roll over. Once he starts getting fussy, time's up. Then the next day, try for about 30 seconds longer...then the next day a little longer and a little longer, little longer, etc.
Just don't do it to the point where he starts hating it.
Personally, I feel it is worth it. It helps them strengthen their core muscles which they need for rolling, sitting ,crawling, etc. Yes, they will still do those things, but it tends to be later than those who had tummy time.
at 7:10 PM on Aug. 28, 2009