Usborne | Just add water to bring roaring, stomping Tyrannosaurs magically to life. Packed with action scenes of T. Rexes hunting, eating, nesting and sleeping among primeval forests, scalding deserts and erupting volcanoes. Use the brush provided to sweep water over the designs and vibrant colors magically appear! A mess-free way to keep children busy, perfect for travel. Simply tuck the waterproof back flap under each page as it's painted, to stop water from seeping through to the rest of the book.