Unlike the standard amorphous Blob Monster, a Cute Slime has a rounded form, like a drop of water on a car's hood (or maybe a gumdrop). They're also more likely to bounce or roll around than ooze. One assumes they have a much higher surface tension or thicker membrane than your typical Ooze (more like the classic Gelatinous Cube of Dungeons & Dragons fame, but not as rigidly shaped). You might also note they have a strong tendency to be colored blue, at least the first or most numerous version.