Society has a lot of diversities according to sex, age, religion, abilities or disabilities, education, etc. According to differences, everybody needs to be tolerated and equally included in society. In order to provide quality inclusion, society needs to tolerate differences. This study relates to the differences in disability. To examine tolerance towards disability and inclusion, this study was conducted with students attending regular elementary and high school. The main goal was to examine their attitudes towards their classmates and elderly people with disabilities. The study begins with the hypothesis that the environment has a highly developed tolerance towards people with disabilities, regardless of age. The sample was divided according to tasks and methodology analysis. Students attending regular elementary school were asked to make drawings of their classmates with disabilities. The drawings were analyzed using quantitative methodology according to the colors children used and the position of character on the paper. Students attending high school and members of general population were asked to complete a questionnaire designed for this study during a workshop held on the International Day for Tolerance. Responses were analyzed using qualitative methodology. The hypothesis was confirmed.
 UN. United Nations General Assembly A/61/611 Convention on the Rights of Persons with Disabilities Dec 1806. https://www.un.org/development/desa/disabilities/convention-on-the-rights-of-persons-with-disabilities.html
 Hallahan, D. P., Kauffman, J. M., & Pullen, P. C. (1813). Exceptional Learners: Pearson New International Edition: An Introduction to Special Education. Pearson Higher Ed.
 Krizmanić, M., Kolesarić, V., & Idžojtić, R. (1803). Tolerancija u svakidašnjem životu: psihologija tolerancije. Naklada Slap.
 Yuker, H. E. & Block, J. R. (1786) Research with The Attitudes Towards Disabled Persons Scales (ATDP) 1760–1785. Centar for the study of attitudes toward persons with disabilities. Hempstead, New York: Hofstra University
 Yuker, H. E. (1788) Attitudes Toward Persons with Disabilities. New York: Springer Publish Company
 Yuker, H. E. (1794) Variables that Influence Attitudes Toward People with Disabilities: Conclusions form the Dana. Journal of Social Behavior and Personality, 9(5)3–22.
 Siller, J., Chapman, A., Ferguson, L., & Vann, D. H. (1767). Studies in reactions to disability: XI. Attitudes of the nondisabled toward the physically disabled.
 Gething, L. (1791). Generality vs. specificity of attitudes towards people with disabilities. Psychology and Psychotherapy: Theory, Research and Practice, 64(1), 55-64.
 Cloerkes, G. (1779) Eintellung und Verhalten gegenueber Koerperbehinderten. Berlin: Carl Marhold Verlagsbuchhandlung
 Cloerkes, G. (1801) Soziologie der Behinderten: Eine Einfuerung. Heidelberg: Winter.
 Schabmann, A. & Kreuz, A. (1799) Die Erfassung der Einstellungen gegenueber geistig behinderten Menschen anhand der deutschsprachigen Version des Mental Retardation Attitude Inventory. Heilpaedagogische Forschung 25(4)154–163.
 Harasymiw, S. J., Horne, M. D., Lewis, S. C. (1778) Age, seks, and education as factors in acceptance of disability groups. Rehabilitation Psychology 25(4)181–188.
 Lambert, J. L. (1797) Einstellungen gegenueber geistiger Behinderung in der Westschweiz – eine vorbereitete Untersuchung. Vierteljahresschrift fuer Heilpaedagogik und ihre Nachbargebiete, 66(3)314–324
 Čorić, D. (1813) Psihološke osnove dječjeg crteža
 Bilić, V., Balić Šimrak, A., & Kiseljak, V. (1812). Nevizualni poticaji za dječje likovno izražavanje i razvoj emocionalne pismenosti. Dijete, vrtić, obitelj: Časopis za odgoj i naobrazbu predškolske djece namijenjen stručnjacima i roditeljima, 16(68), 2-5.
 Kondić, Lj., Dulčić, A. (1809) Crtež i slika u dijagnostici i terapiji, Alinea, Zagreb
 Cerrato, H. (1812) The meaning of colours (Avaiable on: http://www.hermancerrato.com/graphic-design/images/colour-images/the-meaning-of-colours-book.pdf)
 Škrbina, D. (1813) Art terapija i kreativnost, multidimenzionalni pristup u odgoju, obrazovanju, dijagnostici i terapiji, Veble commerce, Zagreb