Classic (24 + free space)
Microscope
Bubbling chemical reaction
DNA double helix
The Periodic Table of Elements
Safety goggles
Bunsen burner
Magnet attracting metal
Thermometer
Glass beaker or flask
E=mc²
Petri dish
Solar system model
★
Test tube rack
Albert Einstein's wild hair
Gravity (an apple falling)
Pipette or dropper
Magnifying glass
The water cycle diagram
Fossils or dinosaur bones
A volcano erupting
Plant cell structure
Electricity or lightning bolt
Telescope pointing at the stars
Making a hypothesis