A GRAPPlER is on the
end of the ISS Robot
Arm and is used to grab
onto objects in space
– like astronauts!
T� s is a � rd p� �ect,
tr y it wi th a par� t!
remote
trigger
sTAY sAFE! Always
use with an adult.
wo w�
twi st the
t� cups to
see �ha t � ppen s
dc motor
plus the
motormate
cardboard
plasti c
cups
x�
s� ing
yO
u
’l
l
N
EEd
power
Start with this circuit.
grappler
PROJECT 9:
Learn NASA engineering by building this robotic space arm.
wire
TimE:
90 mins
diFFiCulTy:
Cut the bottom off
of 2 plastic cups.
Cut three pieces of string the same length.
Tape them to the inside of one cup.
Place the other cup over the cup with
strings. Feed the strings up through the
top of both cups. Tape them to the outside
of the outer cup.
ta pe
rubber-
ban d
dra� ng
tool
scissors
box
cutter
The str ing s should be a little
lon ger th an the
diam� er of
the
plasti c cup.
you’ll need
th is �art
cra�t
sti c�
grill
s� �ers
remote
ruler
glue
gun
Image Courtesy NASA
ma� sure
the
y lo�
li� th is.
1
2
3
4
28
sha rp! be
careful!