C.L.
My daughter only said mama, daddy, milk and "I'm done" at age 3.
I worked & worked with her. Everything I saw, I would say the name of it and point at it or pick it up and look really intricately at it with enthusiasm. She would repeat it after me. Then we'd test it later that day. Then we wouls put on a show and line up the items and I would say what is that? And when she got it right, I would praise, praise, praise! Good for the old self esteem. When kids know they are doing it right, they want to do it again. It worked.