immune system - immunity - antibodies
vaccine
sun - earth - satellite
moon
fruit - sweet - yellow
pineapple
words - pages - spine
book
ocean - shell - tail
lobster
play - bounce - throw
ball
door - lock - open
key
bug - cocoon - leaves
caterpillar
head - rest - bed
pillow
human - number - area
population
teeth - paste - clean
toothbrush
farm - fluffy - baby
lamb
wood - lead - eraser
pencil
small - chopsticks - white
rice
clear - healthy - glass
water
fun - play - people
game
fly - airport - travel
plane
smoke - ash - mountain
volcano
bed - night - tired
sleep
color - sun - rain
rainbow
subject - school - living
Biology
spice - sweet - white
sugar
clock - hour - minute
hand
milk - sour - white
yoghurt