Create a set of only 3 cute and whimsical hand-drawn elements that a bored adult might draw, such as a mushroom, a line-drawn car, and a poorly but cute drawn dinosaur. Each element should be distinct, playful, and spaced out with a lot of white space around them. Ensure the elements are not too small and leave plenty of space around each for additional drawings. The design should have a transparent background, and the elements should fit within a 4500 x 5400 pixels canvas.