First I made a water blob. I made one last year using duct tape. It held up well but sprung a bunch of leaks. And it was tricky to put together. This time, I used this tutorial and ironed the edges shut. It worked well but I found that ironing the plastic really thinned it out. The edges held but a hole appeared in the top almost immediately. Still, it did not detract from the fun. The boys loved it and it was perfect for the 2-yr-old. Once the fun was finished, we let it drain out in our parched lawn.
I also made some splash balls. You will find dozens of splash ball tutorials online. I cut three sponges into quarters. (cut sponge in half, cut each half in half) Lay the three sponges on top of one another. Tie a length of string around the center and pull tightly. I wrapped the string around the whole thing once more and tied a knot. Although some people use zip ties, I did not like the idea of the sharp plastic. Regular string worked perfectly! Fluff the sponges into a ball shape and you are finished. The kids LOVED them!
I got the sponges in packs of 2 from the dollar store which made them even more affordable.
Next time, maybe I will try to make one of those cool PVC pipe sprinkler structures that I have seen on Pinterest!