Sure. The boy scouts have a radio merit badge. Part of earning it, is getting a ham radio license. I don't know if the cub scouts have a similar badge or not.
Either way, your boys seem inquisative enough to enjoy the expirimentation aspects of it.
Hmmm...may be! Matthew's not doing scouts this year, he's a year ahead anyways and he's gonna take this year off to wait for his dad to finish school so he can do it with him next year. It really is Steve's thing.