Love this! Learning from your mistakes and choosing to br make them again (or at least trying your very best to not make them again) is all part of growing up and being mature and responsible. Doesn't mean you think you are better than other. Just means you want to be better than the person you were yesterday.
Cute Venn diagram to show who has siblings in the class. This would be great to extend into questions such as "How many children have at least one brother?" "How many children have at least one sister?" etc. . . .