Does anyone live near Hilltop in Richmond?

What are some activities that I can do with my 11 year old son without spending alot of money. He's now on summer break, so I want to try something every few weeks, like Marine World, Scandia, the movies. Onlt cuz he just graduated and he's a good kid. But past that, I don't wanna send alot of money, nor do I want him real board. What are some ideas we can do on my days off. We have tennis courts, so I'm going to get him a racket (any ideas on a cheap place to buy one), and we will try to play tennis. We have a pool, but both need swimming lessons. We have a dog, so need to find a dog park. We are commited to Denny's every Tuesday when kids eat free from 4-10pm. Any other ideas.