A child in a high chair requires almost constant attention. Babies can slip out of a high chair in an instant if not properly strapped in. An unstable high chair can tip over ... with the baby in it! Make sure that any safety belts or straps on the high chair are securely fastened and that the tray is properly secured. Don't let the child stand up while in the chair, and keep other children from climbing on it. Keep the chair away from "traffic lanes," doorways, refrigerator and stove, and far enough away from tables and walls so that the child can't push the chair over.
If baby is to sleep safely, make sure that the crib is as safe as you can make it. If there is too much room (more than two fingersdth) between the mattress and the side of the crib, an infant's head could get caught in between and the infant could suffocate. Roll up a couple of large bath towels and place them in the space. If the slats are more than 2-3/8 inches apart, the baby's body can slide between the slats and the baby can suffocate.
If the child is old enough to stand up, the parents should set the mattress at its lowest position, with the side rail at its highest position. Check the mattress support frequently to make sure it hasn't become unhooked from the end panels. Any toys you leave in the crib should never be ones that could be used to help in climbing out. Also, do not use crib toys that may have strings or elastic attached to them -- these can strangle or choke! Cribs with decorative knobs on the cornerposts can be a strangulation hazard. Children's clothing and strings or necklaces can catch on the protrusions, especially if the child is trying to climb out. Crib gyms should be removed from the crib when the baby is five months old or can push up on hands and knees, otherwise the baby can get his/her chin across the crib gym or catch clothing on it and strangle.