Anyone got some cool arts and crafts/DIY projects/funny stuff I can do with my cousins?

Every summer, some of my cousins come visit our family from out of state. We're like best friends so it's a lot of fun. We hang out and do fun stuff like go to the beach, go to our local amusement park, and work on arts and crafts, which might seem kinda dumb since now we're all in our teens (13-16), but it's fun. Two of us really love art, so that's how we relax after a few intense days of non-stop awesomeness. If you cant think of art projects, how about activities? We're not allowed to have water balloon fights anymore...

Every year we decorate t-shirts and sometimes we make bracelets or make stuff out of clay. In previous years, we've also made a lava lamp, used an optical illusion to make it look like our heads were expanding, and set off a fountain of Coke and Mentos geysers. Can you guys come up with some new stuff for us to do? THANK YOU!!! :D Have an awesome summer!

Zandy2013-06-30T19:06:31Z

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I just posted DIY fourth of july shorts that are easy and fun!
http://www.youtube.com/watch?v=EgiY5K5BKBA&feature=c4-overview&list=UUnpcmmEndpAzuK8QZrWtz0Q

Anonymous2013-07-01T21:33:51Z

How about getting started with Origami?
http://www.origami-resource-center.com/ - lots of free tutorials
http://www.youtube.com/watch?v=UNdD5Kxdkpg - Robert Lang about the history of Origami and the math behind it, very entertaining, with a lot of humor.
http://www.youtube.com/results?search_query=origami+tessellations&oq=origami+tessellations&gs_l=youtube.3..0i19l2j0i5i19l2.5483.11905.0.12259.21.10.0.11.11.0.129.883.8j2.10.0...0.0...1ac.1.11.youtube.pGOyhuFWttM - and then one of these days you may be able to do something like this.