Other creative toys/products that come to mind would be, say, Play-Doh as a sort of children's intro to...Clay, I suppose? But in this vein without being exclusively directed towards children (albeit I imagine many may be).
Always enjoyed a creative kind of toy to mess around with.
I've recently gotten into model building, in the sense of buying those sheets of pieces that need cut out and snapped or glued together. like this
The issue I have is that I'm not really into most of the things they make models of. Most model kits in this style tend to be classic cars, military vehicles, or anime/Gundams. Not that there's anything wrong with those things, they're just not particularly interesting to me.
But I can spend hours just browsing the model kits on websites like big bad toys