Why practice sitting on your lap instead of using baby seats? Lap-sitting is one of the simplest ways to support your baby’s core, posture, and sensory system in a way that naturally adjusts to them, instead of them adjusting to a fixed plastic seat. When a baby sits on your lap, they experience gentle, responsive instability, which activates the deep core and postural muscles needed for later milestones. They get real-time body feedback (vestibular proprioceptive input) as you shift, breathe, o