1. acknowledge that a virtual artifact was presented on the surface of the table2. move their position in all axis relative to the virtual artifact For about the half of the children, we also asked to3. reach out and grab the object4. move and rotate the objectThe time limit for each kid was assigned from the teacher accompanied them as they had limited time to the festival. The average time of use was 30 s.The parameters that we observed during these tests were:a. Does the user have visual discomfort due to the HMD's structure?b. Can the children easily understand the interaction method and use it?c. What is the most common pose of the hand that the children used to grab the virtual object?