Your baby is instinctively motivated to practice tasks that interest him again and again. He's miraculously and internally programmed to take the logical next step in his development. Your role as parent is key to your baby's learning process. It's your privilege to provide opportunities for him to learn. An infant can't seek out stimulation.
Babies thrive when they enjoy adequate stimulation.
On the other hand, studies show that babies who don't have adequate opportunities for learning experience delays in their development. Tactile Hold and cuddle your baby. Drizzle water over her tummy at bathtime. Let him feel grass or a rough carpet with his bare feet. Let her sit in the sand and run it through her fingers.