Now, you don't write the age of the grandparents, nor the kids..

But here's a few standard ones....

Outside on grass, eagle perspective.

Here, we only want the heads of everyone. And, they have to lie down. Which means you have to stand up, preferably on a ladder..

Place the grandparents on their backs, facing upwards. They mustn't lie next to eachother - instead, place them oppositely, so that the one's left ear touches the other one's right ear. Place the grandchildren's heads up against the elder's heads..

For lighting, a beauty dish placed very high can do the trick. The sun can also, but if the sun's low, you may want to use a reflector (hint: get someone to help you hold the reflector, as it's pretty tough to reflect light at a low angle, while standing on a ladder shooting in a high angle  ).

Outside, sitting.

Place the grandparents sitting on, say, grass. They have to lean against eachother. Then they turn their heads, and look at you..

The grandchildren can be placed whereever you like, just remember to balance your composition. Remember to take care of colors as well, so pay attention to the colors of their dress..

Standing on a bench.

Find a bench. Make all the kids jump up on it and stand there. Place one grandparent on each side..

As always, the trick is to get good shots where EVERYBODY have their eyes fully opened..

Do whatever it takes - take many, many shots, scream, run, jump - I usually do all these things, and with a bit of luck, all my subjects have their eyes fully opened when I shoot... .

"OK all, when I shout 'guinea pig' and jump, ya'll smile and OPEN YOUR EYES. The one's that doesn't get thrown in the later after this session, ya?".

Http://www.fotostart.dk << tutorials, guides etc...

Jakob - great suggestions, Thanks!.

As for the ages - I didn't ask my client yet. But I can get that info (age, sizes, etc) if necessary..

I have one question...what do you mean when you say "Remember to take care of colors as well, so pay attention to the colors of their dress"? What should I look for with the colors?.

Thanks for your help.Smerk..

Some colors will stand out from your environment, others will blend in..

Fx. the color red. Now, red can be found in many hues, but essentially, red is the compliment to green - which will be the color of grass, trees etc... This is from Goethe's color circle, and the learnings derived from this. Complimentary colors - duo harmony, as the basic thing..

But imagine that your subjects are all dressed in black, white, green, blue or yellow. Except one; one is wearing a screaming red or orange sweatshirt..

Now, that single person will stand out for that single reason. Except if you greyscale afterwards, but if the photos are to be used in color, this is not an option..

I'm more used to shoot wedding photos, and if I am to shoot a group portrait of the groom and bride, and some of their friends and/or family members, I always eye the color palette that their clothes are creating. If someone part from the bride and/or groom, falls out - stands out - I will place that person at the edge of the frame, if possible. I will also make the groom and bride take one step forward from the others - which will enable me to DoF blur everyone except the main characters. .

But your situation is different here, so the best thing I can suggest, is to see what you get when you get there. .

Http://www.fotostart.dk << tutorials, guides etc...

Make sure you frame them so they'll fit in the final print size..

Be careful you don't cut off people for an 8x10 print, if that's the size they want..

BAK..

I forgot to mention one more thing... .

Bring a book. A really huge big old looking one. Or ask them to do so..

Let the book's cover be either "blank" not telling anything of what's inside the book, or tell the kids to bring their "Extremely Big Bedtime Book" (evey kid has such a thing, I had three... and when I got older, they made terrifically good fly smashers...)..

Do a setup where the grandparents hold the book, and the kids are peeping over their shoulders, looking at the book..

This is a tricky one to do right, as it has to look both like a "glimpse of the moment" picture, as well as a well-lit pro looking photo that they actually wants to pay for..

Use a large aperture in general, to isolate your motives from the background - but be VERY carefull not to bring unwanted DoF-blur on your subjects as well....

Http://www.fotostart.dk << tutorials, guides etc...

Nice ideas. I hope they want to be creative!Thanks.Smerk..