That’s beautiful! I have a number of those sets, especially the vintage ones. I also have the structure and most parts of set 4875, a Top Agents Secret Hideouts set. I received it as a hand-me-down from one of my former daycare kids who is now 15 and has outgrown playing with them. Since I don’t have any other sets in this theme- and don’t have the money or storage space to add a whole new theme to my collection- I repurposed it as a “planetary outpost” for my Space themed collection. I think it fits the purpose pretty well!
My sets include 3509, 3534, 3536, 3559, 4553, 3908 (maybe? I definitely have that robot. Don’t have a complete black suited astronaut tho), 9489, 9491, and 70110.
My 3536 seems to be a rare version. Purchased new in the mid to late 1980s, it doesn’t come with the blue astronauts that have the domed white helmets. Instead it has 2 blue Klickies, helmets, vest and attachments that are otherwise identical to those in red, yellow and white. One of those klickies is African too! I’m not going to say it’s African-American because this is an international site, but that’s the skin color and it comes with hair that’s different as well. Finding images for my own personal catalog was hard! so it must be pretty uncommon.
I’ve done licensed daycare for 12 years in my current community, plus another 10 years caring for just one child at a time which doesn’t require a license in my area. I have always allowed the children who’ve outgrown naps to use one theme at a time while the littler ones sleep. So I’ve turned many kids onto it! Bonus: I’ve also received hand me downs from several of “my kiddos” as they’ve gotten older, even those I had given them for birthdays or Xmas lol.