Step 1
Step 2 - First touch sensor
Step 3 - Make sure the wire is of the long sort
 Step 4 - Add the part from step 1
Step 5 - Second touch sensor (+long wire)
 Step 6 - Add the part from step 1
Step 7
 Step 8 - Add parts from step 7
Step 9
 Step 10
Step 11
 Step 12 - Add part from step 10
Step 13 - Add part from step 9
 Step 14
Step 15
DONE!

Step 1

Step 2
Step 3

 Step 4 - Connect these togther
Step 5 - This is two lots of step 4.

 Step 6 - Connect all of these together
Step 7 - Two lots of step 6

 Step 8 - Connect all of these together.
Step 9 - Two lots of step 8

 Step 10 - Connect these together.
Step 11 - Add parts from step 5

 Step 12 - Slot in parts from step 9
Step 13

Step 14 - All wheels connected to main base.
Step 15 - Add the RCX

 Step 16 - Add parts from step 2
Step 17 - Add parts from step 3
 Step 18 - Add tracks along the sides

Step 19


 Step 20
Step 21
 Step 22 - Don't forget the 4, 1x2 plates!
Step 23 - Add motors to RCX

 Step 24 - Connect wires
Step 25 - This is a view of the model upside down.

Step 26
Step 27
 Step 28 - Don't forget the 1x8 plate!
Step 29 - Connect all of this together
 Step 30
Step 31

 Step 32
Step 33 - Add parts 31 and 32 together

 Step 34

Step 35


 Step 36
Step 37
 Step 38
Step 39 - Add step 38 to step 35

 Step 40
Step 41

 Step 42
Step 43 - Add step 41 to 42 and make 2 of them
 Step 44 - This is two copies of step 40, the second a mirror image of the first
Step 45
 Step 46
Step 47- Connect 46 to main base

 Step 48 - This isn't where to connect something - just where it should line up after step 47
Step 49 - Connect these together

 Step 50
DONE!