[Lapis has no interest in candy or cakes, mainly because she doesn't have to eat at all and the concept of eating is completely foreign to her. So instead she's sitting cross-legged in the fountain - in the water - and having her fun there.
She has little fish made out of water and sakura blossoms swimming in the air around her and beyond the fountain. A few swim out, probably to bump into unsuspecting people either on accident or on purpose. It's a mystery.]