2 18 year olds girls and amsterdam?

I'm going to amsterdam with my best friend for a week in the summer to stay with my cousin I've been many times- but i need ideas on what me and my friend can do whilst there , as this is the first time we are going without family!
and how old do you have to be to buy stuff in the coffee shops?
indeed gifthorse lol
here's a list someone else gave me! so if you could add similar things to it, it'd be great :) last time i went to went to amsterdam dungeon and it was good fun! so things like that aswell ;)

coffee shops
canal boats
shopping
Red light district clubs
anne franks house
pancake houses
sex muesum
amsterdams bigest pub crawl
heiniken tour

I never got ID'd there, i'm sure you'll find one that will serve you, so only thing to do is get high! go window shopping too if that's your thing ;-)

Stuff, by that you mean....D***S?

There's heaps to do in the Dam.First of all just go to a coffee shop(u r old enough) have a smoke then take in a couple o bars.Trust me you'll soon be content moochin and see where the tide takes you! Just be careful and watch out for them sleezy africans that will pester you,stay on the beaten track! Have fun!

Yea you are legal for the coffe shops i recomend the greenhouse effect , also walking the red light district at night is an experiance there is also a tonne of awesome things to do away from the main area but if its a short stay id stick to the main things mentioned on the list me and a few mates(also 18) will be there in the summer 2 c u there ;)

Might be nice to let your cousin suggest some things. You're old enough for the coffee shops, so that should be interesting atleast once. The canal tours are good too. I enjoy just sitting outside many of the small cafés and walking around the city making drawings or taking photographs. The museums are always fun if your in to art, I particularly like FOAM. The red light district is always fun to walk through at night. For most tourists it's alot about the girls and looking inside, but I just like how pretty the canals look when they're lit up. There also a number of monuments, statues and buildings spread out, that although not worth a trip in themselves are fun to see while you walk. You could also check out the street art scene. You can find the most surprising things if you just stop to look. Oh, and since it will be summer, lets not forget the parks and private gardens (some of which are open to the public.

The Heineken tour is fun - if you like beer :)
Last time i did that, it was the birthday of a friend, and he got a free beer mug to take home. So if one of you has a birthday, then that would be the day to do the tour.

coffeeshops are overrated imho.

The Van Gogh museum, the Rijksmuseum are also very popular. And close together as well)

Just going out at Leidseplein is fun too. Many different bars, and always a lot of people about.

With Anne Franks house - get there early. Long lines are always there :(

Rembrantsplein is also fun to visit. The Nightwatch painting has been recreated there in statues. Now you can be a part of the famous painting.

You could take a train from Amsterdam to other cities (Haarlem is very nice, or Enkhuizen) or a bus tour to Volendam.

Sex museum, i personally found it boring. But some people visit it for a giggle.

Red light district - again, a dissappointment for me.
But, if you do decide to go, take care NOT to take pictures.
I did because i was with a group, and nearly got attacked by one of the ladies who went ballistic at me.

Look at www.amsterdam.info for more options.