Buy this: items that serve more than one purpose. As discussed earlier, infant positioning and alignment are important but often overlooked. One item that accomplishes all these criteria is a U-shaped head support pillow that cradles baby’s head in car seat, keeping it in midline. Car seats often have infant inserts, but they rarely keep baby’s head from falling to the side. These pillows, when used correctly, successfully do so most of the time.
This pillow also serves as a great prop for tummy time for younger babies up to 5 months. It lifts baby’s chest slightly, not overextending her back, helping her weight to shift backwards towards pelvis. It hugs her chest to prevent rolling to the side. It provides a barrier to keep elbows in line with or in front of shoulders.
I love finding truly useful, multipurpose items that are reasonably priced. The infant head support pillow fits these criteria beautifully.