At the lower end all you need is a tarp, shovel, a hose, and probably a pump to filter the water. You can also build one out of wood (we did this when I was wit

At the lower end all you need is a tarp, shovel, a hose, and probably a pump to filter the water. You can also build one out of wood (we did this when I was with the scouts, and the biggest cost concern was the price of the water). It doesn't need to be expensive; not every swimming pool has to be a large and fancy.