All of my siblings are way older than I am, but I don't believe any of my nieces and nephews are in the single-digits age-wise anymore. My sister is the second youngest, and she's about 8-10 years older than me, but it's really funny, because way back when my niece (her oldest daughter) was still a little kid, I was in my late teens, but my niece got it into her mind that I was in my 30s, because her dad was 30 at the time, and she was of the belief that uncles are supposed to be older than dads, lol.
But anyway, something else new I learned today was BIG BIRD IN CHINA was originally going to have something of a framing device with Grover, similar to what Global Grover ended up being, but there was some sort of issue with the Chinese wildlife or something and Jon Stone didn't want to put Frank Oz through any of it, so that idea was scrapped.