Periodic Table
This brick model of the periodic table was part of Lego's Make Everything ad campaign, fitting since elements make up everything around us.
The periodic table organizes elements, substances made up of one type of atom, according to their properties and behavior. For example, the noble gases -- helium, neon, argon, krypton and xenon, are listed together as group 18. They are odorless, colorless gases that aren't very reactive.
Elements are arranged from left to right based on atomic number, which refers to the number of protons an element has. Hydrogen, the number 1 element, only has one proton. Carbon has six, and xenon has 86. Typically, the higher the atomic number, the heavier an atom is.
Images: 1) Lego ad campaign. Lego. 2) Periodic table of the elements. Wikipedia.