Charlie (3 1/2) doesn't have any allergies that we're aware of, so we don't worry about him eating any type of nuts. Olive (21 months) hasn't had peanuts yet, though there really is no reason to wait since we don't have a history of allergies.
Lately I've been giving them homemade trailmix, and they love it! I put in dried apricots, cranberries, papaya, walnuts, almonds, and pistachio nuts.
Does your LO eat nuts? How old are they?