My son:

* Elmo - Toddler years
* Thomas the Tank Engine - Toddler to K
* Wild Kratts - Toddler to now
* Superman/Batman/Superheroes - K to 2nd grade (now)

My daughter:

* Elmo - Elmo was also her first love.
* Wild Kratts - She loves animals, so she can't get enough of this show.
* Tom and Jerry - Her and her brother both love Tom and Jerry. I don't really get it now, but I remember also loving the show when I was a kid.
* Wonder Woman - She really loves superheroes like her brother, but she gravitates towards Wonder Woman and female heroes!