My son (35 months old) speaks fairly well, but is consistently confusing his personal pronouns.
Examples: "Her is eating her food," "me is going to my room", etc..
Sometimes he gets them right, but it's about 50/50 at best.
I'm assuming this is normal, because it seems like this would be a harder concept to pick up than simple association of a single word with a concept (a duck is always a duck, but keeping track of whether it is her/him/he/she, based upon the context of usage, is more complex).
Is there anything I should (or should not) do to help him? How long does it usually take for a toddler to master pronouns?