The fact that children can’t read body language properly is really problematic. Aurea Verebes, a German trainer specializing in dog-child relationships and bite prevention showed three pictures to 103 children and asked them for their assessment. Practically none of the children got it right. If the child thinks that the dog is smiling, while they are actually threatening, that’s a “bite out of nowhere” situation waiting to happen!
Luckily neither you, nor your child have to be experts in order to read canine body language. There are some general indications to follow that even small children can understand. These are general recommendations, only you know your child’s cognitive capacities and can determine what makes sense to teach them at the moment.