Logiblocs Super Inventor's Inventors Manual page 9

Step 4
Now place the Logitester on a flat
STRAIGHT
surface and add on the rest of the
STRAIGHT and CROSS blocks as
Y-BLOCK
well as the Y-BLOC as shown.
Press the BUTTON and check that all the
green lights come on. These blue blocs take
messages from place to place.
LIGHT
SWITCH
Step 5
Now take off the blue pieces and replace the BUTTON
on your Logitester with the LIGHT SWITCH.
Cover over the lens of the LIGHT SWITCH and see how
the BLEEP goes on and off. This bloc switches other
blocs on when it sees light.
9