100
apple
backpack
board
books
bottle
briefcase
bulb
bus
calculator
capsule
clock
clouds
collection
drops
experiences
eye
eyepiece
formula
garbage
germs
glass
glasses
globe
hexagon
ice
icons
illustration
lens
letter
magnet
magnifying glass
microscope
molecule
monitor
ointment
optometrist
pencil
rain
ruler
scales
school
set
simple
snowflake
table
vial
water
wave