Remote control an electric motor

Can anyone tell me if a low voltage d.c. 2 way relay reciever exists?
I have only been able to find ones with an imput voltage of 9-12 volts.
I am trying to control a reversable 3.6 volt d.c. Gearmotor and wish to use the same 3.6 volt battery to power receiver/relays/motor etc.
Thanks in advance.

You can buy remote control units specifically designed for this or buy a cheap remote control car.