Components (price approx. 35 EUR/39 USD ):

1,Arduino UNO
1,Base Gearbox Kit
1,Cable channel
1,L293D
1,andruino shield
3,HC-SR04
1,Micro USB OTG Male to USB Standard B Cable
3,LDR
3,Resistor 10 Kohm 1/4 W
1,Straight Male Pin Header
1,Straight Female Pin Header

1,Zener 5,6V
1,4 AAA battery holder