tadpole is a good pet to me

I think a tadpole would be a nice pet because when it grows up i can see how it looks. And know the experience of it and be an expert so when i grow up or rite now,i can teach people stuff and when i am young i could have a test on tadpoles i will know it all.It doesn't have to be on tadpoles it can be on other animals like dogs,cats,insects,turtles and birds,did you ever have a pet that tough you stuff? Did you ever had or have, a pet that helped you learn when you went somewhere ,or did something?Or did you win something because you had it?