I have a huge repertoire of what to do when bored in an aeroplane.
Just a few examples:
Steering exclusively with cowl-flaps.
Putting a touch of right rudder trim, then steering exclusively with hand stuck out of storm window.
(In a sliding canopy type) cracking open the canopy and steering by putting hand out one side or the other.
Setting GPS to maximum sensitivity, then hand-flying exactly along line (typically 40m FSD).
As above, but only using rudder and elevator trim.
Find combinations of NDB freqs which will spin the ADF needle continously.
or, as an absolute final resort, read the GPS user manual and see if you can find how to do all those silly things they can do.
W