Vanja Vuković Nikolić is a preschool teacher at PU “Perka Vićentijević” in Obrenovac. As part of the support for the online learning community, implemented in cooperation with UNICEF and the Ministry of Education, Science and Technological Development, she held a webinar together with her colleague Ljiljana Janković on the topic “Digital Tools in Professional Development,” presenting an example of good practice called “Children’s Sudoku.” During the webinar, both lecturers and observers exchanged experiences and, through joint reflection, improved their knowledge and skills in using digital tools for professional development. She also presented this teamwork at the horizontal level within her preschool institution together with her colleague Ljiljana Janković. She was also a participant in the horizontal learning that was an international project “Examples of preschool online support for children and families during the Covid-19 pandemic” organized by the “Rastimo” Kumane Association, presenting her work. She participated with her colleague Ljiljana Janković in the competition organized by the Institute for Modern Education, which presented their work “Children’s Sudoku and other games on the LearningApps website” in an online format within the Center for Professional Development. Her professional development is based on constantly building quality relationships with herself, others, and the environment. By organizing space, diverse topics, and materials, she influences children’s independence and trust in their own abilities.