These all-in-one, molded-plastic play stations typically resemble traditional walkers—but without the wheels, which makes them a less risky way for your baby to have fun and get a little exercise.

A stationary activity center keeps your baby relatively safe in one spot while you do other things, such as make dinner—and maybe even eat some of it, too. A stationary activity center can be used as soon as your baby can sit up unassisted (some start at about 4 months and most by 6 months).

Most stationary activity centers adjust to three or more heights. Your baby will outgrow it when he’s 30 to 32 inches tall or weighs 25 to 30 pounds; that’s the maximum height and weight recommendation for most activity centers. You should stop using the activity center when your child can walk or even stand up by himself. A standing or walking child can tip it over and get injured or trapped. (See more activity center safety tips.)

Do you use a stationery activity center for your child? Share your experiences.