They both took a few sips of the water and almost immediately the change ms started.
Liams clothes got looser on him, his pants fell and his underwear, his shirt got so big for him it fell right off him. He was completely naked and the size of a soda can.
His dad however, started outgrowing his clothes, his pants ripped off him and his shirt too. His underwear tightly gripped his dick making it look larger. It ripped off too and Dan was at least 15ft tall.
“Wow daddy you’re so big now!” Liam said “And Im so tiny now”
“It’s amazing isn’t it? Im probably the tallest man in the world right now, and I can still grow bigger” Dan said.
Dan went towards the fountain and scooped two handfuls of water and drank it twice. He grew much faster. He was soon as big as the house, and he could barely see Liam now. He grabbed some more water and rubbed it on his dick. Only it started growing, It went from 3’ to 13’ to Dan but to everyone else it was as big as a car.
“Daddy, I want to grow back to normal! I don’t like being small!” Liam shouted.
Dan picked him up and placed him the growth water, he grew back to normal.
For the rest of the day, Liam played with his 30ft dad. They went into the pool and to Dan it was like a bathtub. His now gigantic member stuck out of the pool and little Liam was playing on it.
“Daddy look!” He shouted as he slid down the giant penis like a slide into the water.
Dan laughed and picked up his son so he could do it again.
Even though it was the school break, Dan still had work, so he drank from the small bowl until he was almost back to normal. He was at 6’7 now and his dick was still 13’.
He wore his business clothes which were now very tight on him. He had an idea and brought out two different plastic bottles. He filled them with water from each bowl. Dan didn’t want Liam to use the fountain while he was away so he made him drink from the small bowl until he couldn’t reach it. But he overshot it and he shrank to 5” tall. Dan was already running late so he just took Liam with him.
They drove to the office but before getting out of the car, Dan had to decide where to put Liam.
“These clothes are so tight that you would be crushed in any of the pockets.” Dan said to Liam. “The only place I can keep you is in my crotch, is that ok Liam?”
“Yeah it’s fine dad” Liam said.
Dan unzipped his pants and placed Liam in is underwear. He kept him at the base of his dick and he tried to zip his pants again but he struggled to do so. Finally he did it and he went out. Dan was the boss of the entire building so he went to his office after grabbing some coffee. Dan sat down an pulled out the two bottles and placed them on the table. He thought of all the things he could do. He could shrink the hot intern and make her his play thing. Or prank people by suddenly making them grow. Or he could change his size around the office and mess with the staff. So many choices.