I've fosterered a few.
Salem once managed to escape, ran horisontally up the fence and onto the roof (bungalow) which he decided was too high.
Cue meaw get me down, meow don't touch me, eow get me down. My friend had to balance on a plasit chair to get to him and hand him to me.
Once we were all back inside friend gave salem a lecture about if he did it again he would be taking up a new career as violin strings.
Lilly and Tonks loved plastic mice with catnip in, they would just lie in the hall with one each in their mouths, if you tried to move it they would Grrrrr at you, but the grrr would get higher the further you took the mouse, you could almost play a tune.
Tonks also attacked a remote control dalek, a full on attack that involved emerging from behind furniture and knockin the dalec onto its side before holding with front paws and kicking with back legs.
Annie would 'meow' to be let out, but was deaf so her meow was silent. She would open her mouth really loud and eventually just before closed her mouth there would be a quiet 'Ack'.
Beatrice would walk on the curtain rail between two wardrobes - no idea why, probably because she could.