The letters and number are K & Company Fun Alphabet Flip Pack which are adhered to Stampin' Up Whisper White and Scrapbook Walls Mini Rec Squares. The vertical element is also Scrapbook Walls Mini Rec Squares. The dinosaur and footprints are Karen Foster Design Dinosaurs stickers. The 'IS' is an alphabet stamp of unknown origin. The sentiment is Stampendous Friendly Messages.