Remember those color by number books you had as a kid that you struggled to stay within the lines? Well, Melbourne-based artist Thomas Pavitte has created a similar version for adults. Querkles, a “puzzling colour by numbers book,” is a similar concept to what we all colored on as kids, but with a neat twist. Instead of just filling in the numbered spaces, you’re presented with overlapping circles, cross-hatching, and other shading techniques to achieve a final product like the one of Elvis Presley above. There are two Querkles books available with a third on its way in October.