Thanks again for the replies ladies
She is still too little to blow bubbles or in a whistle or harmonica etc but I really appreciate the suggestions and will definitely try these when she is a bit older. At this age she is changing every day so maybe it won't be too far away! I also plan on seeing if she will use a jolly jumper soon when she has a little better head control. She is a really good screamer when she is grumpy and I look at that as a blessing in disguise, any form of lung exercise I will take

I have had so many people make the comment, 'oh, there's nothing wrong with her lungs is there'.. EVERYONE comments on her screams lol