Worn joints. Just like the other joints in your body, your neck joints tend to wear down with age. Osteoarthritis causes the cushions (cartilage) between your bones (vertebrae) to deteriorate. Your body then forms bone spurs that affect joint motion and cause pain.
As the user guide explains, kids hardly read (and you canât expect a 3 year old to read!). So you get games which teach you about letters and numbers starting from the real simple ones to others that teach more fundamental things like reading time or guessing colors.
There are TONS of kids that do not even know their letters and numbers when they go into kindergarten! I have a degree in early childhood and most children learn these things when they are 3-4 years old. Of course, the more you work with them, the faster they will learn. My daughter is 32 months. She has known all of her colors, body parts, animal sounds and shapes by 18 months.