When I first saw rice shapes like this (but much fancier), it was on an aspirational Pinterest board that should have been called something like "I'm a better parent than you so nerr". "Ridiculous," I spat at my screen. Then I realised it's actually pretty easy to do. Rice moulds and nori cutters are available from Japanese grocers but it's not too hard to form shapes by hand, or with cookie cutters, and nori can be snipped with scissors. Stuff the rice balls with a morsel of leftover meats, avocado, cooked or raw vegetables, or use more traditional onigiri fillings such as salted plum.