@darkcorners3 Loved the video. I should get my hands on this box. Judith Kerr even describes the making of the gloves in one of her own books:

„When the episode was broadcast he stood on a box behind the picture of Poets’ Corner and poked his fingers with the twirly bits through the slot. Then, at the right moment, he very, very gently moved his fingers. And the entire nation was terrified.“

(Judith Kerr’s Creatures, Harper Collins, 2013, p. 60)