On Tue, 03 Dec 2013 21:46:45 -0700, SteveB
wrote:

I want to build a project with my 8 and 10 year old grandsons while they
spend the time with us. I want it to be one for each of them, and
something that would last. I want it to be useful, or decorative for
their room. They might only get to do some filing or bending, but
something that they could help build.

Suggestions?

Model cannon? I did one with a nephew. Didn't get as far as
trunnions and a carriage. He loved it.

Functional would be cool, but an invitation to mischief. I intend to
do a functional one for myself some day. Maybe model Napoleon.

Pete Keillor