When Rex gets taken from the bedroom into the bathroom for playtime he finds himself with a whole new group of friends. The bath toy's only problem is that they need water to move around, so when bath-time is over, so is party time. Keen to shake off his party-pooper image that he has with his regular group, Rex embraces his inner party-saurus even though it is not really his nature.
This short film is a very basic affair – the plot is simple, the gags are mostly sight-gags and it is very short. So in that regard it is not really anywhere near the standard of the full films but at the same time it is colorful and quite fun in what it does well. The sense of energy and fun in the bath is quite infectious and, although it wasn't hilariously funny, it did have nice characters and I enjoyed it. The content is below the standard expected but the delivery isn't – with the animation and sense of humor still working and this is more or less enough to carry the lesser material. Best for kids, but it has enough going on to be amusing to the casual viewer.