Since I mentioned (clapped my hands, shouted from the rooftops, squealed with sheer delight) that we used glow in the dark string at Super Hero Grandma Camp, I have had requests for the directions. It is a top secret formula that only those empowered with Super Hero talents can know (aka: Grandma's!). I used craft paint and water! I used Folk Art Brand glow in the dark craft paint. Yes, it really is called that! Tulip also makes glow in the dark paint.
I diluted it with two parts water to one part paint. I used a plastic butter spread tub to mix it and then unwound the garden string into the water/paint mixture.
And then laid it out on a plastic tablecloth to dry. It takes a few hours to dry and will be stiff. I rolled it into a ball to take down into the family room where the villain was setting a trap with a hostage. I knew that laser pointer lights would be a little more difficult to use with the kids bouncing around, so this was a cheap and easy fix. I had the kids take turns entering the family room so that I could have a few minutes of light exposure to "recharge" the string.
Next I pulled the string from the paint and squeezed out the excess. Your hands will get messy but it is for a good cause!
And then laid it out on a plastic tablecloth to dry. It takes a few hours to dry and will be stiff. I rolled it into a ball to take down into the family room where the villain was setting a trap with a hostage. I knew that laser pointer lights would be a little more difficult to use with the kids bouncing around, so this was a cheap and easy fix. I had the kids take turns entering the family room so that I could have a few minutes of light exposure to "recharge" the string. 
This was so cool that I was absolutely giddy in anticipation of having the kids and their parents enjoy it. The picture really was taken in the dark, but I am SO GOOD with my camera, especially in the heat of the moment, that the flash was on. My adult son climbed through the 'lasers" so I would be happy and to show his 2 year old that Dad is fun.
I hope you can use this string idea in one of your Grandma Camps, I know it will be used again sometime at my house. Enjoy!
