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