Tie Dye Nails: Get a bowl of water Pour little bits of all the different shades you want (it should float on the top) Swirl with a toothpick, (Until it looks how you want) Then dip your nails through the water.
Here is 15 Best polka dots nail art ideas for summer. Cute polka dots nails with bows and diamond Stylish black and glitter polka dots fall nails Red glitter polka dots nail art for Valentine’s Day Polka Dots Fall Nail
Not sure about blue nails, but maybe I'll give it a try anyway. Essie Summer 2012 Collection - 'Bikini So Teeny' Nail Polish: really cute color that looks similar to Lapis of Luxury from but I will have to give this one a go as well.
I never thought of this but this would work and the glitter wouldn't chip easily like it does as a top coat. A coat of glitter in between two layers of color = marble effect - never thought of this, must try!
The natural alternative to gray hair is dyeing. A very honest, easy-read story by Kara who now uses henna. Her page also states that onion juice and sandalwood essential oil might help with the gray hair. Plenty of interesting comments too.