“Most experts agree that pack and plays are suitable and safe for babies and toddlers to sleep and play in,” says Dr. Abelowitz. “It is important that babies sleep on their back in the pack and play or crib, and keep pillows, loose blankets, stuffed toys, bumpers, and other soft objects out. Lastly, parents should make sure the pack and play mattress is firm, flat, and fits well and that the sheet is snug around the mattress.”  When it comes to using a bassinet attachment on your pack and play, Dr. Hoffman urges parents to stop doing so once their baby starts to roll over. “It’s really important that parents follow this guideline,” says Dr. Hoffman.