Well my dear there are all sorts of nail design kits you can get at your local cvs/walgreens/rite aid shops in the cosmetics section. If you cant find them just ask one of the people that work the floor...I am sure someone can help you find them. If for some reason you cant find a kit, jetc is correct, you can find art pens.
If you cant find either then you are just going to have to get a bit creative.
Get a ling thin brush for stripping or a stripping pen, a few basic colors of nail polish and one of those 2 sided dot maker...one side is used for making small dots & the other for big dots.
Now get creative...look up some tutorials on youtube...I like to look at some nail art...so I type nail art tutorials on yourtube & there are so many awesome videos that you can do yourself. Just make sure you have basic colors like black, white, blue, red, brown, purple, yellow also get a silver & gold with sprinkles in them to highlight...separately of course...the rest you can create yourself...like pink..you can mix colors like red & white and just adjust according to your taste. Orange can be made with red & yellow as well...blue & yellow for green...and if you want lighter shades like gray, black & white...for a baby blue mix blue & white...and so forth. The options are simply endless...
Hope this helps...have fun.
Paint your nails white. After they dry, grab a cup of water, tape, a toothpick and nail polish in a few different colors. Tape the skin around your nail so that polish will not stick to it. This makes cleanup much easier. Drop one drop of nail polish in the center of the cup, select a different color and drop that in the middle of the original color. Repeat the process using all of your colors several times. Take a toothpick, swirl the colors around, and then dip your nail in. Use the toothpick to take away the left over polish that is not on your nail. Remove the tape, and you're done! There are a ton of tutorials on youtube:
Nail art pens are the easiest way to do nice nail designs yourself. They have a little metal nip that the colour comes out of and you can dot it, draw lines with it and so on. They make designs a lot easier than using a small brush dipped in nail varnish. Sally Hansen, Rio Pro and lots of nail companies do pens, just have a look around a big drugstore or beauty store near you. Then once you have applied a pattern you like make sure you use a clear top coat and you will protect the design from chipping :)
One of our members has submitted some very informative tutorials:
you could use sally hansel salon effect :) its really easy too use and lasts about a week
trying to teach the marble dip...lol nice!