I aree with Bigeasy a mauser would be a really good place to start. it's the best engineered action available and requires a loot of work, which is what this type project should about. A Savage is more of an assembly that a build. You don't learn how to drill and tap a hole, polish metal, shape metal or work on a mechanism. Is it the easiest way to get a rifle made...NO. but if that were the criteria simply buy a rifle, used, and restock it.. Quick and cheap. But then that's not the point of the exercise. Teach a boy to find TDC and drill a hole, then tap it for a scope base.,. Install a scope friendly safety. Install a short chambered barrel and set the headspace with a rented reamer and guages. Buy a pre-inlet stock and install, bed and style the stock. It culd even be a 10/22 Ruger. A cheaper build and a fun rifle for a youngster. Of course the teacher either has to have some serious gunsmithing skills or the Ruger would end up an assembling rather than a build.. A lot depends on how complex the father wants to get and how much he already knows or is ready to learn..