Ionic Bonds demonstration kit for a classroom to demonstrate charge balance and ionic compound formulas. Contains monoatomic and polyatomic ions from 3-, 2-, 1-, 1+, 2+, and 3+. Anions have pegs, representing more electrons, while anions have holes for the pegs, representing less electrons. No magnet needed since friction holds them together. Easy to customize the formulas and colors. Storage rack included. All done with PLA, no additional assembly or processing needed.