Smaller bodies, developing systems, and a lot of time on the floor. This is the category where being picky pays off most.
What to look for
Fragrance-free everything, GOTS-certified sleepwear and bedding, untreated wood or food-grade silicone toys, and mattresses certified to GREENGUARD Gold or CertiPUR-US. Avoid flame-retardant-treated sleepwear.