Supervised tummy time is extremely beneficial for baby's digestion,sucking skills and muscle strength.
You can start at birth.
Where?: First month on mom or dad's chest.
After first month,on firm surface.
When?: Leave 1 hour gap after feed
How often? At least 5 times a day for 5 minutes each time.if baby is not comfortable in tummy time,do shorter sessions.
Next Steps
you can look up The TummyTime Method website for details