Rex London Temporary Tattoos – Dinosaurs: Roarsome Fun for Dino Fans! Let kids step back in time with the Rex London Temporary Tattoos – Dinosaurs! Featuring a variety of colourful dinosaur designs, this fun set is perfect for little palaeontologists. Easy to apply with just water, these temporary tattoos make a great party bag filler, stocking stuffer, or fun activity for dino-loving kids.