The main shields will be:
1- Sequential programming: 5 switches (RIGHT/LEFT/UP/DOWN/GO).
2-Follow liner: light and color sensors.
3-Personality module: screen and gesture sensor.
4-Prototyping module: no limits.
5-Obstacle avoidance: ultrasound sensor.
6-Connectivity I: wifi and bluetooth.
7-Connectivity II: RFID
Some design and apps ideas: