Four year olds like...
Give them lots of opportunities to play with other children - at the library, the park, the Early Years Centre. Sometimes they like having just one or two friends over to your home to play.
Point out words in books and run your finger under words while you read to them.
Talk about the order of events - describe what happens first, next and last - "first we wash our hands, then we have a snack and last we put our dishes in the sink".
Encourage them to tell their own stories - by asking them to tell you about their day, to describe a movie they watched, to tell you about their favourite book.
Read books rhyming words - "mouse/house", and point out sounds at the start of words - Mommy starts with the 'mmm' sound - that's the letter M.