That Slo-V isn't little, it has an almost 4-foot wingspan. Parkzone even makes a "sonic combat module" for it that plugs into the x-port jack on the Slo-V. You and your son could actually try to "shoot each other down" with a pair of Slo-Vs and the sonic combat modules. You can plug in lights for night flying, you can also drop a parachute figure from the plane.

I don't own stock in Parkzone or anything, I just think that the Slo-V is a good match for what you're looking for.