I didn't click through all (mobile, too slow) so don't know if it's in there, but one favourite i have is the one where he has an ice cube, a metal block and a

I didn't click through all (mobile, too slow) so don't know if it's in there, but one favourite i have is the one where he has an ice cube, a metal block and a plastic block and ask people on the street which block is colder. It teaches a lot about what temperature vs feels cold vs heat is.