As a parent of four kids, I'd encourage you to decide to have kids based on some other criteria - you can do this project without the presence of kids.
However ... taking your comment in the spirit in which I'm guessing it was intended, my wife and I have had a lot of fun helping the kids try almost anything they were interested in. There's simply no reason to limit a child's curiosity (and I'd argue that many of us here are those whose childhood curiosity survived somewhat intact). Kids interests can change weekly and we just let that happen. We did usually require that they finish a project once they started it.
One example is that I was digging fence-posts and commented to my wife that, under the top-soil of what was once our farmette, there was a layer of clay. Of course my daughter pictured the type of clay that artists use (and a pottery wheel) but did you know that, with the right amount of water added, you can mold Pennsylvania (US) clay just fine. And you can do a reasonable job of firing it on a patio grill (don't try glazing it).
I was brought up helping my dad around the house and we also extended this to our kids ... if we didn't know how to do something we learned it together. And so now our kids (the two who are adults and out-of-the-house) will do much of their own maintenance. My daughter's first car is a '71 Super Beetle in which she completely restored the interior. I helped her weld new cooling manifolds which was the only exterior/mechanical problem with the car.
Finally, there are lots of kids that don't have parents (and plenty that have absentee parents. Here in the US you can volunteer with Big Brothers / Big Sisters and "borrow" a kid for a limited amount of time. Volunteering is also a great way to help the next generation of "makers" grow in their craft!