((BS and ER arrange for children to talk directly to camera))
BS: ((to Charles) What was your favourite bit of Techniquest?
C: I liked the bit when - you had to um - you had to - push the - push the black ball - black ball and
J: The black ball would never stop it won't. Would it.
D: And I like the part where's this dark room and you go into this dark room and you make a funny face on the wall and this camera takes a picture of your shadow.
ER: I remember that one.