My first tri-strings were made with this design. It is simple and effective and can be adapted to materials on hand. You can make great bubbles with super-simple tri-strings. All you need are two handles and some string or other wick material. This photo-essay shows a simple sturdy tri-string. In the pictures, I am using PVC pipe, but you could use just about anything. This tri-string was sized for a 4 year-old. This is a pretty good size even for bigger kids. Click on the images to see them at a larger size.