A walker can be dangerous by allowing access to places that would not ordinarily be entered, such as stairways. When traveling by car, have your baby well-anchored in a safe car seat at all times. During infancy the seat should be in the back seat. It should face backwards until the child weighs at least 20 pounds. When you begin this habit at an early age, there will be no difficulty restraining him in the car later on.
Children behave much better on auto trips when they are in a safety car seat.
When strapped in, they are not likely to stand up, hang out the window, or climb all over the driver. The second DTaP, Hib and IPV shots are given at this visit. Diet Solid foods are started at this age. If they are refused at first, wait 3 or 4 days and try again. It is better for the baby to eat just a little than for you to insist that all that is offered is consumed.