This study involves a series of harmless procedures to test the properties of the skin in babies and the collection of information on how parents care for their baby's skin over the first 12 months of life. All types of procedures to test the skin are non-invasive and have been used safely in previous clinical studies in babies. Whilst FTIR spectroscopy was used in a previous study conducted by our team in babies (the OBSeRvE study), the investigators will now use a different FTIR instrument. Compared to the benchtop device used for OBSeRvE, the new instrument is better adapted to remote use because of its portability, is safer to use because the measurement head is made of rugged inert materials (diamond and stainless steel) compared to a fragile loop, and the detector is electrically cooled by batteries instead of liquid nitrogen. This device has been tested in humans for safety.