Version made using the 
Brainy-USB Starter Kit
 
push
switch
solar motor 
DC motor 
screw
connector
OR
 Brainy-USB Starter Kit 
This kit has these extra parts
in the plastic bag    
*Supplied instead of the open
battery holder above
 
Switch with  wire
DC motor
Screw connectors
Switched battery holder with wires
Strip of  wire for use with motor and switch 
DC motors are supplied
but solar motors may
prove
more reliable in more
critical situations
It has all the hardware to get going  as shown below
Note 
USB lead (can be shared) and  4 x AA batteries also needed
NOT SURE IF NEEDED