climbing then descending S-turns while changing speed.
Such or similar fun used to be a standard first endorsement sim exercise to give the trainee a feel for the machine.
My favourite was to start S&L on a heading and then enter a steady climbing turn to arrive on the same heading, 1000 ft higher while increasing steadily to 30kt faster ... and then do the same on the way back down. Then repeat, this time losing the speed increments.
Got the eyeballs and thinking cells active.
Then, interspersed through the routine session stuff of the endorsement, get the trainee up to being able to hand fly, raw data, an ILS in 0/0 to a stop on the centreline. Very much confidence building and the I/F stick and rudder skills skyrocketed.