This is not the answer you were looking for but.....
No child who is not already capable of holding themselves upright on two feet should be put in a piece of furniture that encourages an upright posture. The floor is a child's neurological workshop. As the child progresses from moving on their stomach to hands and knees they are preparing their anatomy and neurology for the act of standing. A child builds truncal strength, depth perception, proper curvature of their spines, righting reflexes, and tactility during these stages of development. Putting a 4 month old in a jumper or exersaucer is harmful in two respects. One, it prevents this natural developmental process. Two, it is confrontational from the persepective of their visual, tactile and anatomical abilities. The best thing you can do for your child, especially a four-month old, is to put them on their stomach. Putting them in an upright position before they are able to maintain it themselves can interfer with the process that develops both the brain and anatomy of a little child.
In health,
S. L. G., Jr.
Exec. Director
Active Healing Inc. (a 501 (c) (3) organization)
www.activehealing.org
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