Lost kids TV show

Im finally posting about this on the forums after making a account but im currently looking for this kids show I used to watch as a kid. I remember the show was on Netflix but I cant seem to remember the name only the plot. The plot was about these 5-6 kids solving problems throughout their town/school. there were some parts of the show where it was animated in a way similar to OMORI but other than that it was live action. I only remember the plot of one episode which was “what is the mona lisa smiling at?” If someone also remembers anything else about the show like its name than it’ll be helpful.

EDIT: (also to explain what i meant by “animated in a way similar to omori is that some parts of the show looked like it was drawn on a piece of paper and just inserted into the show.)