Print your favourite dauber coloring page and then use a bingo dauber to 'color' the empty spaces on the page. You can print a black and white version if you prefer and then color the rest of the picture after using your dauber.
If you do not have bingo daubers readily available or in the right colour there are a number of other options. In the past we have used pom poms or round stickers as alteratives. My husband's favourite alternative is cereal. Cheerios, honeycombs or fruit loops all work really well to fill the spaces including the space in his tummy while he is doing the craft!