K.J.
New moms generally don't know this particular thing about what their baby needs - floor time - so I would suggest a Tiny Love Tummy Time Mat. Babies may be safe in a carrier, be it front, backpack, or car/swing, but their bodies need to develop muscles and certain brain development, which happens while on the floor. For example, while on their back, they actually open up the pathways in their brains for memory and attention!
Merry Christmas to you all!