The present invention is generally directed to systems related to sleeping, playing and provision of non-toxic environments, components related to those systems, and methods involving the systems or components. It is more particularly directed to systems, components and methods that aid early infant cognitive development, improve ventilation inside a crib, promote fresh and/or odor free air, promote thermoregulation and homeostasis, protect the person using the systems, components and methods from biological toxins, and create healthy sleeping environments for infants, toddlers, children and adults. One sleep system according to the present invention includes a cover, a core, and a bottom. The cover includes at least two raised areas. The raised areas have one or more heights ranging from 0.125 inch to 5.0 inches and diameters ranging of 0.25 to 10.0 inches.