This hairstyle is also called "Netting" but I call it swim hair because it's perfect for the pool. Start with a crown of 5 elastics creating a crown at the top of the head. Next, divide the small ponies into two sections each and combine them with a section of new hair to create your second row. You will have 6 elastics on your second row. You can create as many rows as you would like but I usually stick to 2 or 3. Combine the remaining hair into a ponytail which you can braid, curl or leave straight. I've done a quad braid here. Add your favorite hair accessory and you're done! (Just remember to take the accessory out before swimming.) As you can see, it holds up great in the pool!
Tip: Take the elastics out with a seam ripper from your sewing kit!