Have You Ever

Have you ever seen a hurumpadoo fly,
Or a fridgo walk in the wind?
Have you ever heard the call of the gnuffy,
As it calls out to its baraboo mate?
Have you ever flicked a droog off your nose,
As it attempted to fly it’s way up?
Have you seen the walk of the digerdon,
Or ride on a happerjack’s back?
If you have, please tell me where they were seen
As they escaped from my zoo last night!