City builders are usually good for that, like cities skylines or tropico.

Kerbal Space Program. The game mostly consists of slapping parts together and seeing if they'll fly. It's a good combo of creativity, problem solving, and an arcadey flight simulator with orbital dynamics.

It's simple enough to pirate and it runs on most operating systems.

Blender, it's open source and you don't really need a lot of technical skill to design cool looking shit. Once you learn the basics, Ian Hubert and CGMatter tutorials are great and like two minutes long each

It's uhh, not really a game but it has essentially replaced those games for me when I want to sit down and fuck around making shit, and there's always a ton of youtube tutorials for almost any subject, from post-apocalyptic buildings to grass that looks like ghibli

Stardew Valley

factorio on peaceful mode

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You ever think about downloading ableton?

Space engineers takes a bit of practice for the learning curve in survival, a lot less if you're just making big ships in creative though.

Ive been getting a huge kick out of Space Engineers. Designing mining equipment, combat vehicles, planes, rovers, hydrogen refineries etc. Lotta cool stuff especially if you use mods

Planet Coaster's free build mode might be what you're looking for. I don't know if you're console or PC, but I know it's on Xbox and Steam.