Quantity   Component name
1 × Arduino Uno
1 × 9 volt dc power supply for Arduino
1 × White led
1 × Photoresistor https://www.amazon.com/goeasybuy-Sensitive-Resistor-Photoresistor-Optoresistor/dp/B01CGCNO34/ref=sr_1_1?ie=UTF8&qid=1475243846&sr=8-1&keywords=photoresistor
1 × Parallax Ping Ultrasonic Range Sensor
1 × 100 ohm resistor
1 × 30 K ohm resistor
1 × Velcro Brand White Tak Putty (or any other stick and release putty https://www.amazon.com/dp/B002M9GOSE?psc=1