My little son didn't much like tummy time either and we didn't have much because of his reflux so that didn't help much. He is at the stage now though at 7 months where he is happy to lie on his tummy and reach out for toys and play with us in fron of his face. He has just started reaching out for things in front of him, particularly the bottle on the lounge beside us and he ends up on his hands and knees to do this and then on his tummy as I move the bottle further away for him to try and reach. He loves doing this and does it straight after his feed, so that is a good sign for us and his reflux. We also spend a bit of tummy time on the spare bed with a toy in the afternoon just before our showers and now everytime we go past the room he looks at the bed and gets all excited. But the moral of the story is:- persevere and make it fun, put things in front of the baby's face for them to play with or put in their mouth and eventually they will start enjoying it.