Really handy trousers for those wet days out. Hatley Fun Colour Changing Monster Trucks Splash Pants. Let your little ones splash in the water and watch their faces as the trucks change colour, such fun. Crafted from a durable material, the easy pull-on design includes an all-over truck print and elasticated waist and leg cuffs for a secure fit. See the Monster Trucks Raincoat from Hatley.