Their bodies, spines and musculature are not developed for them to be upright. This means that we should be conscious about the amount of time non-sitting babies are spending in upright positions in carriers, infant seats or car seats. The value of floor time. Floor time gives your baby a chance to discover her body. Floor time means a baby is laying flat on his or her back and can move unrestrained by the sides of a seat or carrier.
Many parents put a blanket or a thin pad on the floor.
Some people feel more comfortable with baby laying on a big bed or mattress. If your baby is up off the floor, it is important that she be supervised at all times. Infants seem to have an amazing ability to learn how to scooch or turn over when we aren t looking. When babies have floor time they have the freedom to move and to exercise almost every muscle in their bodies. On her back she begins to develop the muscle tone that will eventually allow her to turn over, crawl and sit up.