Overview

Parts list 
    1. 4 wheels with motors: 
       http://www.banggood.com/4Pcs-DIY-Car-Model-TT-Motor-Encoder-Wheel-p-979886.html
       $10
       
    2. 8 inch by 10 inch sheet of acetate 0.09 thickness
       Found at Menards
       $4
       Note: Thinner thickness is not suitable.
       
    3. Slide Switch    
       http://www.ebay.com/itm/5x-Black-Mini-Miniature-50V-0-5A-On-On-DPDT-Power-6-Pins-Slide-Switch-Brand-New-/252075232744?hash=item3ab0dacde8
       $0.75
       
    4. Some wire (about 4 foot, 18-22 gauge is fine)
    
    5. Bluetooth control module  
       http://www.instructables.com/id/Bluetooth-RC-vehicle-controller/
       paulware@hotmail.com
       
    6. Hot Glue (about 1 stick)
    
    7. Battery holder case for 2x18650 batteries with wire lead: 
       http://www.ebay.com/itm/BATTERY-HOLDER-CASE-FOR-2X-18650-BATTERY-WITH-WIRE-LEAD-/171554721181?hash=item27f1754d9d
       $0.75
       
    8. 2 x 18650 batteries   
       $2.36
       http://www.ebay.com/itm/3-7V-6000mAh-18650-Li-ion-Rechargeable-Battery-for-Flashlight-VP-/221854896097?hash=item33a7950fe1
       
    Total parts cost: ~ $36


Tools list   
    1. Electric Drill
    2. Drill bit for plastic/glass (Available in Home Depot)
    3. Soldering Iron, solder
    4. Hot glue gun  
    5. Battery charger for 18650 lithium ion battery 
    6. Voltmeter to adjust the voltage    
    7. Small flat edge screwdriver to adjust voltage
    8. An android device
    
Steps
    1. Drill holes in the sheet of acetate per photo
    2. Wire the motors in "parallel", don't worry about color of wires. 
       Place a bit of hot glue at each solder joint to protect this weak spot
    3. Hot Glue the motors to the acetate sheet and push the glue through the holes, this gives a strong bond
    4. Screw the battery holder into the acetate holes (use 6/32 screws) , and glue in the switch.
       Watch the switch as it may pop out before the glue dries. 
    5. Feed Motor wires through the holes.  The order should be (from left to right): 
          Lower Right, Upper Right, Lower Left, Upper Left 
          This will ensure that the car responds properly to the bluetooth controller
    6. Connect the power supply to the battery and adjust the voltage output, this will require a small screwdriver
       and a voltmeter
    7. Connect the other controller components
          Note jumper wire from + Battery pole to h-bridge input
    8. Load the mit app inventor 2 program "jeneral".  See this instructable:
          http://www.instructables.com/id/Bluetooth-Control-PC-Tank-Android-Arduino/
    9. Pair with the bluetooth controller (password=1234)
   10. Run the jeneral android app
   11. Drive the vehicle.