Secure SketCH

#Armillary spheres, planetaria, astronomic orbits, atomic models, molecular models #Surfaces or backgrounds covered with repeated geometrical figures, figurative elements or inscriptions #Letters or numerals representing a human being, an animal, a plant, a heavenly body, a natural phenomenon or an object #Letters presenting a special form of writing #Colours #Atomic models, molecular models, representations of human, animal or vegetal cells #Surfaces or backgrounds covered with repeated geometrical figures or designs #Surfaces or backgrounds covered with circles or ellipses #Letters or numerals representing a human being or a part of the human body, an animal or a part of an animal's body, a plant, a heavenly body, a natural phenomenon or an object #Letters or numerals representing a figurative element #Blue