I use Panacur in syringes to worm my kittens, its very easy and convenient. I dont use any flea treatments on my kittens unless they have fleas then it would be Frontline spray as its safe for use on young kittens, I havent needed to yet though.

A word of caution - it is not recommended to use any dog flea treatment products etc. on a cat. Not worth saving a few pennies and killing your kitten/cat in the process.