Everyone in our family enjoys this - aged 9 through teen years and to the adults.  What we love is how we can play together in competition while also working on individual goals.  Each player has to try to gather enough of the right colored cards to make train route connection across North America,earning points as your train route grows in length.  Players try to block each other.  Strategy can be simple for the younger kids or more complex for the adults.  It is best played with 3 or more.  I like most that 5 can play easily.