Welcome to the Neftali Tennis Junior Learn to Play Programs! Red Ball 2. OBJECTIVE Learn to play from all areas of 36-foot court. Total 60 minutes, tennis class for 5 to 7 years olds. We offer a fun environment for your child to develop their gross motor skills while learning to send and receive a red dot tennis ball with their hand and their raquet. Please Note A minimum of 3 players are required to hold the clinic. Lessons may be canceled and refunded if the minimum attendance is not met. Thanks for you understanding.