Sequence for Kids is very popular with my son too.
Have you looked at the games offered by Discovery Toys? They are really fun and kids love them! Plus, they're educational (but the kids don't know that).
There is an uno/crazy 8's-style game called "Short Vowel Fun" that uses words instead of numbers: http://www.discoverytoyslink.com/esuite/control/product?P... I am giving it to my son for Christmas.
There is also another word game that is Bingo-style, called Letter Fun Lotto: http://www.discoverytoyslink.com/esuite/control/product?P...
ABSeas is a fun fishing game where kids fish for different upper- or lowercase letters: http://www.discoverytoyslink.com/esuite/control/product?P...
A 4 year old who knows all their letters and sounds might be able to play A to Z Junior, where they try to think of words from different categories that start with different letters (such as Disney Characters or musical instruments): http://www.discoverytoyslink.com/esuite/control/product?P...
Money! Money! teaches kids about the different kinds of money: http://www.discoverytoyslink.com/esuite/control/product?P... (my son just started playing this and, although he doesn't know how to add up the money yet, he's been having a lot of fun with it)
And finally, there are "Beyond the Book" collections that pair a book with a game. The games usually have several different versions so you can play in a lot of different ways.
Visit http://www.discoverytoyslink.com/karenchao to see all of the toys, including the Beyond The Book collections (in preschool toys). Orders placed by December 13 are guaranteed to arrive in time for Christmas. All products come with a lifetime warranty!
Don't stand in line. Shop online! Happy holidays.
K. : )