Earth day temporary tattoos would be a really fun way to support this day. Each tattoo is an Anatomology original art design. They measure 1.5 inches so they are not too obtrusive. They will last for 2-7 days depending on the care that they receive. They can be removed with soap and water and vigorous scrubbing. This pack comes with 40 tattoos (classroom size) 10 of each design. We tried to make very different designs to satisfy the desires of your diverse students.