The two best things to get for your cat is a laser pointer and catnip! They are both amusing for us, and the cat loves them too! Right? Catnip is well known to be a cats favorite and much of my time has been spent watching my cats act crazy once they get their paws on some! Buying organic catnip can get expensive though, so I started growing it myself.
My cats love it and I save money, Win/win, right?
Catnip (Nepeta cataria) is a member of the mint family. It's sometimes referred to as Catmint. When licked, sniffed or injested it seems to produce a euphoria response in cats. Here's an excellent explanation of why it works for cats. It's interesting to note that though catnip winds cats up, it tends to have a calming effect on us instead.
Some people even make it into a tea for themselves for anxiety!