Don’t throw away your old tennis balls because they could be of good use. Just like this party ball that is stuffed with lots of red lasers and powered inside by a rechargeable lithium ion battery. An Arduino, known as Teensy, is used for the operation of the laser ball. Since the ball is controlled remotely, the lasers are animated by sending IR input signals to the receiver.
The movement of the lasers can be captured with a DSLR camera. This is so cool and would not incur too much cost. You can also choose a bigger ball as big as a basketball or a football. Imagine how many lasers it could accommodate!