For the eyes, you can buy ready-made sugar eyes or make chocolate: melt white chocolate in a water bath, make circles when it hardens, melt dark chocolate, from which to make pupils, tails and ears.
From the sponge mass to make “corpuscles” of mice, insert eyes, tails and ears.
I did everything late in the evening, and in the morning I wanted to take pictures. But there is only one tangerine left))) Enjoy your meal.