While browsing the site, a product caught his eye:
Grow-Your-Own-Terrarium:
Just Add Water!
It kind of reminded him of when he was a kid and they had the grow-your-own sets with triopes. Since it was so cheap (Just A $1.99!), he had to buy it.
A few days later, the kit was waiting for him on his doorstep.
John opened the box, expecting a plastic terrarium, some growing solution, something, but all he found was a rock.
"Just add water my ass!" John said, but a note at the bottom of the box caught his eye.
"Thank you for purchasing a Grow-Your-Own-Terrarium kit! All you have to do is add water to the transfiguration stone and a terrarium will appear right in front of your eyes!" John read.
John raised his eyebrows, but decided to give it a shot. Taking the "Transfiguration Stone" to the sink, he held the rock under the water.
At first, nothing happened. And then it began to glow...