In my experience in using this with my Daughter (age 7) I think the main efficacy of blocks comes from making it easier for kids who don't know how to type to u

In my experience in using this with my Daughter (age 7) I think the main efficacy of blocks comes from making it easier for kids who don't know how to type to use the basic programming concepts we are used to (nesting, loops, conditionals). What other aspects of efficacy are you thinking should be considered?