“There should be different kinds of pictures, cloths of diverse colors, and pearls placed in front of the child, and one should use nursery songs and simple words; neither rough nor harsh words (such as those of Lombards) should be used in singing in front of the child. After the hour of speech has approached, let the child’s nurse anoint its tongue frequently with honey and butter, and this ought to be done especially when speech is delayed. One ought to talk in the child’s presence frequently and easy words ought to be said.”
The Trotula
Yes, pearls are a choking hazard. But let’s be serious: the real threat to your child’s well-being is the harsh songs of the Lombards.
How to Dress Your Child, c. 1200, here.