I first saw the Water Blob idea on U Create although there are tutorials all over the place. It sounded like the perfect thing to do on a hot day. We decided to make it our Fourth of July activity. I got a 9 x 12 piece of heavy-duty plastic sheeting and some duct tape. I folded the sheeting in half and then duct-taped the sides shut leaving a hole for the hose. There were some very minor leaks but otherwise the blob filled up perfectly.
Noodlebug had a great time rolling around on the blob as I was filling it up. It made for a nice cool waterbed experience. When Noodle's friend came over, they had such a fun time with it!!!