Khan Academy has a bunch of different grade levels available for free online that anyone can do, one of which is Kindergarten. All of these grade levels have a "Course Challenge" that tests you on a various subjects. The run would be taking the course challenge for Kindergarten with timing starting when you click start challenge and ending once the last question is answered. I plan on doing runs of this on stream as a meme and I think it would be a fun meme speedrun to have a leaderboard for, kinda like IRL% for Pringles or Pencil Sharpening Simulator.

Link to the Kindergarten Course Challenge: https://www.khanacademy.org/math/cc-kindergarten-math#cc-kindergarten-math-subject-challenge