2 Axis (pan and tilt) turret with LaserDiode as TCP. Different movement speeds, automated movement "cat play" and 7 Segment display 

You need:

 

2 Servo motors

Arduino UNO

7 Segment Display

Shift Register ( mine is 1538HXL)

rotary encoder

LED

Laser Diode

some resistors (depends on your LED's and 7 Segment Display ~220ohm)

lots of cable