A/N: thanks SO much to the following reviewers; it really makes my day reading your reviews! PotterPhan21, Fantomgirl 1 on 1, jessicajason, dessyweird51, Lucky Phantom, RemembertheLegacy, LovelyxBunchaxCoconuts and Allie Phantom. You all rock! The track for this chapter is "Little thoughts" by Bloc Party.

Danny and his father walked in through the front door after a hard day's work ghost hunting.

"Beer?" Danny asked his father as he headed over to the fridge.

"Sure. Ah, I tell ya, there's nothing like a father sharing a beer with his son after a hard day's work in the family business." Jack Fenton said happily.

"Yeah, the family ghost hunting business. What worries me more is that we GET business." Danny laughed.

"Uh, son, not to pry, but why is there glue in the fridge?" Jack asked pointing.

"The better questions are, one: where's the squeezy mayonnaise," Danny began as he pulled the glue out of the fridge and looked at it. "And two, where are my daughter and her dumb friends?" Danny said walking into the living room.

His living room was dominated now by stacks of old newspapers, printers, scissors, a giant heap of scrunched up paper and a huge three-sided triangular display.

"Which genius is trying to use mayonnaise instead of glue?" Danny asked holding up the bottle.

"Well... that explains a lot." A skinny brunette boy said popping up from behind the sofa.

"Artists." Danny sighed shaking his head in dismay as the boy went back to sticking things to other things with glue this time.

"Dad, you remember Josh right?" Danny asked pointing to the skinny teenager.

"Hey Mr Fenton…'s… dad…" Josh said shyly pushing his thin glasses up his nose.

"Uh, does that mean I shouldn't have eaten that sandwich?" A blonde boy asked skidding into view on a computer chair.

"See, this is why I buy non-toxic stuff." Danny sighed.

"And yet, I'm not comforted." The boy said standing up at a towering six foot tall.

"And this towering monster that's determined to eat me out of house and home is Aaron." Danny introduced him.

"God, last time I saw you, you were four foot tall!" Jack said shocked.

"What can I say? I had a growth spurt." Aaron said sheepishly.

"Or five." Josh said slightly bitterly.

"Where's Alex?" Danny asked. Aaron and Josh both pointed to the huge pile of scrunched up paper and a white-board full of crossings-out.

"I wouldn't go near her though, she's in one of those science moods." Aaron warned.

"She can't figure out how it's possible." Josh explained.

"That's because it's not! There is just NO way that it's scientifically possible!" Alex screamed kicking the pile of paper across the room. Danny grinned, Alex had such a temper on her sometimes, just like her mother, unfortunately though she had gotten the 'mad inventor' gene from her grandfather.

"What isn't possible?" Danny asked cautiously.

"This whole ghost kid thing, there is just NO way he can be half ghosts half human!" Alex snapped shoving a picture of Danny at Alex's age in ghost form in his face, Danny gulped.

"It's just can't be done!" Alex stomped away angrily.

"What if like… he was a ghost brought back to life but stopped half way? That would be half ghost half human right?" Josh suggested.

"No, that would be a zombie." Alex corrected rolling her eyes.

"Or a ghoul." Her grandfather chipped in, Danny shot him a look, he didn't want this subject encouraged.

"Or a ghoul." Alex conceded. "The only MARGINALLY possible way would be to take a live human and blast him with raw ectoplasmic flow until ectoplasm literally bound itself to his DNA making him part ghost but also part human." Alex complained.

"That… sounds… plausible?" Aaron ventured.

"That's the thing, it's not." Alex frowned walking over to the whiteboard and wiping it clean.

"See, one ghost will leave smatterings of ectoplasm whenever it uses a lot of energy. Like poltergeists for example. But that's sort of, dead energy, if you'll excuse the pun, it's the waste product of the activity. To leave live ectoplasm on a human it would have to be directed at a human." Alex said drawing as she spoke.

"So, mystery solved, a ghost attacks some guy and he becomes half ghost." Aaron shrugged.

"Yeah, and if you light a match the world will catch fire." Alex said sarcastically. "One ghost just wouldn't cut it, you'd need like… the entire afterlife moving through one person which…" Alex went silent for a moment and her eyes widened and her mouth began moving to form silent words.

"If X is the resilience of human DNA… and Y being the force needed to alter it and if you move X number of ghosts through test subject A then… but you'd need somewhere for the ghosts to go TO… some kind of… portal… between this world and the ghost world. If… just if you happened to be in this portal a precisely the point that it opened and the ghosts flowed through then… it just… might… work." Alex murmured stepping back from the board that displayed a perfect blueprint of the ghost portal that had turned Danny into who he was today. Danny's mouth hung open, gods Alex was frighteningly bright sometimes.

"But… that's so dangerous though, too far one way or the other and you'd be screwed, but the science IS sound. But you'd have to have the on switch inside of it, who would be THAT stupid to put one there?" Alex frowned.

"And who would be so ghost obsessed to build a machine like that?" Josh asked. Danny and Jack looked at each other.

"Eh, who cares? We just need to get this project finished by morning." Aaron shrugged.

"Mmm, you're right." Alex shrugged copying down her notes on paper. Danny and Jack breathed a sigh of relief.