There is an ongoing joke about Eric not being able to grow a mustache, yet in this episode, he has stubble of a mustache and goatee.
Woofy, at Funland, is played by Tom Kenny, the voice of Spongebob SquarePants.
The twins who make fun of Kelso are Dylan and Cole Sprouse, who went on to star in "The Suite Life of Zack and Cody".
The name of the amusement park the gang goes to is called "Funland". That '70s Show (1998) creators, Bonnie Turner and Terry Turner, wrote the screenplay for the 1987 film Funland (1987), also about an amusement park.
Dylan and Cole Sprouse appear as kids messing with Kelso by playing the "repeat game". They would later go on to do almost this very same thing with Rachel, on Friends, to the point when the adult becomes frustrated and yells, "dammit!"