Here's what Robert Krampf, the Happy Scientist, does to a six-year-old:
Ramona: "Mommy, may I watch another science video?"
and: "Can we scare the pepper again?"
I've posted about him before but we've always used his free stuff. Recently, I decided to spring for the $20 a year subscription, and he is worth every clean, shiny-thanks-to-the-ketchup penny.