Make your very own mouse friend! What's In The Kit? 4 blocks of high-quality Ditto polymer clay (50 grams each) Makes 2 or more mice. A step by step guide. Our simple instructions are created with care, so don’t worry, you or your kids will have no problem-o following along to make your oven-bake clay creation! Content and materials are not for commercial, school or paid program use without authorization. For baking instructions and to learn more about Ditto click here.