a) We build a bus similar to P1, but here the robot is programmable.
- 2 DC motors and 1 Buzzer are connected to the robot.
- After the bus is switched on, it beeps with Buzzer, then follows a pre-programmed route and finally stops.
- We build the little girls like in -P1.
b) We connect 2 little girl figures and 1 Touch sensor to a common mother board.
- The little girls have LEDs in place of their eyes, their heads are mounted on servo motors.
- When the touch sensor is pressed, the two little girls look at each other, the 2-2 LEDs in their eyes flash and then turn away from each other.