Re: They forgot to add the right fungi
Over three decades ago my younger brother was given for his birthday one of those water-rocket kits - you know, a valve assembly with Dan Dare rocket-style fins, that you screw onto a plastic 1 litre Coke bottle, half-fill with water, stand upright, and inflate with a bicyle pump - once the pressure exceeds the valve's limit, the water is rapidly forced out and the bottle ascends skywards.
Well, enamoured of this toy, I took it into school a day or two later and was demonstrating it to my friends when Mr Fisher, our Physics teacher, promptly confiscated it.
And for all the rest of the day, as I sat through History/Latin/Biology lessons, I could see Mr Fisher out on the playing fields, repeatedly launching the rocket, scampering after it to retrieve it and giggling like a small child. He got way more fun from it than we had chance to!
"And let that be a lesson to you, boy!"