My DS is 4.5 months and is very big for his pram bassinet - he only just about fits abs isn't comfortable. He also hates the way he has to stare upwards from the pram a d can't see what's going on around him. I'm thinking if converting our pram (bugaboo cameleon 3) to pushchair mode in the next couple of weeks. DS is able to sit in a bumbo chair and a bouncy chair so has good neck control