"Tummy time is when your infant lays on his (or) her stomach while supervised," says Wendy Wallace, DO, a pediatrician at The Children's Hospital of Philadelphia Care Network.

Sonny suffocated on the floor during tummy time while a child care worker cleaned nearby. The FBI is now investigating Sonny's death.

While you have a little extra free time in the house quarantining during the pandemic, it's a good way to make sure you're helping your baby develop optimally.

More Sean Gallu/Getty Images Three-quarters of parents (76 percent) claim they're confident they know when babies should meet their milestones.

The ultimate playtime powerhouse for babies? Baby play mats and gyms! These engaging spaces provide a comfy place for tummy time, playtime, and sensory exploration during those precious first months.

What activities should I do with my baby? Olivia Vallejo in South L.A. asks: What are the best activities to do with babies each month for their development?

To make tummy time more pleasant, offer your child black and white pictures to gaze at, distract them with toys and songs, or get down on their level to engage with them.

The best baby play mats have extra padding and can help keep your child entertained. We spoke to health experts about the best mats for babies.

Most babies learn to crawl at 7–10 months. Some babies do not crawl at all. Read about crawling styles, how caregivers can encourage crawling, and more.

Her areas of focus include everything from health, safety and nutrition to early literacy, early brain and child development and child care.