Pattern identification is no longer a tough job for your kid as now he's capable of identifying the correct flashcard from the deck if you show him a picture related to the same. He's grown up enough to analyze the common points in a picture and identify a similar one from the deck.
What you need to know
Make use of such cards and other objects to check his skills and also to sharpen his intellect whenever possible. You dont have to make special time for this, instead make his everyday jobs fun by adding such small yet meaningful games to his daily activities.