One note: All of these mats are intended for supervised play and not for sleep or naps. If you’re looking for other products for your nursery, we’ve also written about the best glider chairs ...

The fentanyl that killed a one-year-old child at a nursery in New York City was hidden in the nap room under a mat as he slept, police say. Nicholas Dominici, who had been at the nursery for just ...

It said the two most common types of sleep positioners feature raised supports or pillows (called "bolsters") that are attached to each side of a mat, or a wedge to raise a baby's head.