Playing tennis with your kids and teaching them racquet-to-ball basics can be a rewarding activity, and there’s no need to be a pro to pick up some skills for the court. All you do need is a little help from the PlaySports TV Web site, which offers tips on positioning, footwork and hitting the ball. Also, NYC-based tennis pro Esther Forrester clues parents in with helpful pointers for lessons. First, she reminds moms and dads that even the most high-energy kiddos won’t be able to play for long when learning. Start with shorter sessions – 15 or 30 minutes – and foam balls and a portable net. After you brush up on your skills as an instructor, you’ll need a place to play, of course. Consider Radnor High School in Radnor at 130 King of Prussia Road, as it boasts kid-friendly courts. Alternately, Awbury Recreation Center at Ardleigh Street and east Haines Street features 12 lighted courts and a hitting wall.