Parents often ask me “At what age can children recognize left from right?” or “When do kids stop confusing left and right?”
Kids can tell left from right as early as 3 years of age. Every kid has a bank of words in their brain. For every kid, the bank is a different size.
Some kids need to hear a word 700 hundred times before they “know” the meaning of that word and can use it. Some kids, like those with learning difficulties, need lots more. Keep saying it to add to your child’s bank.
Never, never, never teach right with left at the same time. This is the mistake that creates adults with difficulties with left and right or difficulties separating “b” from “d”. Never teach them together.
Pick one. If your kid is right-handed, teach right first. If he or she is left-handed, teach left. Talk about “the right hand” (or side) and “the other hand” (or side) for a long time before you introduce the left.
I am a special education teacher. You won’t believe how many problems there are only because similar things were introduced together and the kids (and grown ups) can’t tell which one is which.
So the age is not the important thing, but how you learn it.