I cant choose to ignore it because they will get outta control, destroy my house (not to mention my sanity) as it escelates quickly! The only thing I can do is seperate them from each other till they calm down, sometimes this can be all day however.
sorry that you are struggling with thtis too.
Oh, the joys of parenting :)
Oh that's what I meant.....separating them and not making a big deal about the giggling. Not ignoring it and letting them go wild! I cant imagine
lol, ok

When DD starts this with her cousin who has ADHD/ODD/BP etc we seperate them and the visit is over. I know you cannot do that with sibs but seperating them is a good idea, until they learn to control themselves. I would explain why they are seperated, and let them know when it will be over.
I cannot imagine having 2 with ADHD, and I do sympathize.
my 8 yr old twins get in these laughing hysterics almost every meal, when getting ready for school, when brushing their teeth etc! As much as I am pleased when they are getting along and not beating the tar outta each other, the non stop silliness is really inappropriate and highly annoying sometimes. I have tried all methods of begging pleading demanding yelling and revoking privilgesNOTHING MAKES ANY DIFFERENCE! Consequenses mean nothing to these guys, they can cry and seem soooo sorry but as soon as you leave the room or turn your back they are doing whatever they want or laughin hystericaly again!!! They start out just giggling, then hystericaly laughing, then making loud noises, then it escelates from there, into god knows what, throwing food, smearing toothpaste, wearing underwear on their heads...funny I know, but when you have two kids with ADHD and getting out the door, or into bed is such a huge procedure, this really DOESNT HELP!
I dont know what the heck to do..anyone else deal with anything like this?
Well, I have to admit getting into uncontrollable laughing hysterics from childhood into at least teens.......and I don't have ADHD. When it was happening, I was having SO MUCH FUN. I wish that I could do that everyday now. Sigh. But it never escalated to destructive.
Strategic separation is probably the best solution. Do they sleep in separate rooms? I'd put out their breakfasts separately, etc. While one eats, the other gets dressed and so forth. If it gets out of control, you could just do the 1-2-3 Magic timeout.
123 magig timeout?? I am not familiar with this
and I too remember the uncontrolable giggles as a kid, and it is fun and totlay hilarious...but Im talking several times a day when the rest of the family is trying to relax, or talk or get out the door! It gets to be way tooo much
and they do have seperate rooms finaly since we bought our new house last month!! yipeee!
Will has started this too, right when he's in trouble and I'm trying to reasonably talk to him. I think it's so disrespectful and it makes me SO mad.
Sorry I don't have any answers for you. I cannot imagine what it's like with 2 of them..
My youngest does this too. I also have no advice but can sympathize. The only thing I've found is ignoring it. Like all these behaviors, the more attention it gets them the worse it is. I've actually put my daughter in another room until she's ready to eat, dress, talk, whatver it is she wont do because she's doing that silly laugh or singing in bathroom talk....her new favorite is God Bless Afartica......nice huh, she then replaces as many words in the song as she can with the word fart...........of course her 13 year old sister who has ADHD thinks this is hysterical and records it on her cell phone............so I'll take any advice on stopping the craziness too!This is hysterical (or pathetic, I'm not sure...) but as I'm reading this, I hear my 7yo DS (ADD, SPD) and my 4yo DD egging each other on in the kitchen over dinner.
I felt like the worst parent in the world when one day I lost it and yelled at my DS (then 4 or 5) "NO LAUGHING!!" All I could think was, in 20 years he's going to be telling this to some therapy group, who will all be tut-tutting about his shrew of a mother. 
I have to separate mine when they do this.
1-2-3 Magic is a book. It has lots of interesting ideas. One of them is a timeout method. You might want to check it out.I am having the creepiest case of Dejavu. I also have 8 yr. old twins with ADD. God love them - they are the sweetest children and almost never fight, but spur eachother on like nothing I've ever seen. It's like a play-date that NEVER ENDS at my house.
They have so much fun together that getting their attention or asking them to do something no matter how simple proves to be a monumental task. No matter how well prepared I am to deal with a situation they always have their little double there ready and eager to distract! I can't tell you how infuriating it is to be pushed to the limit, lose it, have your kid in tears, then have them glance over at their twin and start laughing.
I recently put them into seperate rooms just so they will go to sleep at night and not wake eachother up so early in the mornings. Aye! The mornings! Getting ready for school can be a nightmare...
Lucky for them they are cute...
Yeah - I think I'll keep them. 
edited to add: I used to post here, but couldn't remember my user name and now have a different email address, so I created a new name...
Willows39462.5024074074Yes I am with the time out plan. That is what I do. I have to have a way to stop what is happening. Sometimes it is the hysterics and other times it is rough play or attacking each other in retaliation. I say time out! And every one is supposed to run to their chair. The chairs are big and comfy and I can easily see both kids. If they go for a last hit or shove I say that is 2 minutes! If they argue, that is 3 minutes! If they get out of the chair it starts over. Set a timer everyone can hear. It is amazing what 2 minutes can do for your sanity.