Ali,

Charlie is only now holding his head up and is only now trying to figure out how to roll over. He's not keen on tummy time either, and used to just lie there if I put him on his tum.

But he giggled at a young age and slept through at a young age, so in some ways he going great guns, and in others, he's taking his time off the mark. Baby milestones are just guidelines and different bubs will progress at different rates.