What can 4 yr olds do?

You really cant expect much from kids until they are around six. Four year old would not talk very well, but you NEED to be able to understand them. They can go to pre-K from kids who are four to six. Yes, they can listen very well, and their other senses are pretty sharp. From 0-8 years are the "smart" years of a human being since they can learn very quickly, actually they can learn how to say and remember a new word before you remember how to do a math problem!YUP they can sure remember a song, not perfect, lyrics may be in wrong orders but yes they can (if they listen to any music) Their parents should probably read them a story, teach them the alphabet, numbers, colors, and more basic stuff, and exercise. They can sure call there parents mommy and daddy if ever taught.