The screwdriver is perfectly okay, it makes noises and crystal lights. The only (but verschmerzbares) drawback is that in open crystal holder only the lower Druckknopft triggers the electronics.
The sound screwdriver is indeed produced from plastic and in China, but I've just new in the 90s as Bandai had worse Memorabilia was seen for more money. So price and performance ratio. Even if you see the screws on the mechanics, it does not matter, because they look as if they belong there.
Whether the screwdriver in children stops from 12 to noon, I can not say. For Dr. Who fans, it is a great gimmick.