These DIY Steampunk Tennis Rackets do look more like ping pong rackets, don’t they?
Regardless, you can learn how to make one here.
The ball is made from a couple of carrier bags, so all in all this is a very nice little project that doesn’t require much in the way of special materials or equipment. Like with just about all my projects, a glue gun is very handy to make the project go quickly, but you can use white woodwork glue (Elmers or PVA) if you want to