My ds has gone from playing happily by himself for hours to just sitting or lying down with his blanket. If he does ever play with something it's always the same toy tractor. He would be quite happy to sit on the sofa with me all day. He follows me from room to room and just lies down next to me whatever I'm doing. He gets plenty of sleep at night and a nap during the day, but he just seems so tired. I asked the HV whether he could be anaemic, but we discussed what he eats and she said he is getting plenty of iron. I just feel his behavior isn't normal. Any suggestions?