While we were in Hawaii, this product could be found at every ABC Store and just about any other beachfront store for $19.99. It can be found here for $9.99 plus s/h. If you know in advance of your beach trip, it might be worth picking it up for cheaper because I'm sure any touristy beach will overcharge for this thing.
I don't know the big deal with this is. It doesn't "bounce" on the water. It's more like a "skip" like when you skip a flat rock across the water's surface but this isn't going to poke an eye or knock teeth out.
Needless to say, we passed on this little gem.