Giant sushi rolls ( which you can slice of you have a very sharp knife) which can be wrapped in seaweed sheets ( nori) and then ( non pvc) cling film make delicious and nutritious meals in themselves which children love to make.
I know of many children who wouldn't ordinarily eat oily fish or avocado tuck into these with gusto!
Precook a big batch of sushi rice ( rice or slow cooker).
Finely chop avocado, red and yellow peppers, cucumber etc.
Once rice is cooked stir in a generous amount of sushi vinegar and let cool.
If you don't have sushi vinegar then add sweetener of your choice and taste, to rice vinegar.
Add tinned fish ( a mixture of different ones such as tuna, mackerel, salmon or sardines in oil NOT tomato) mashed with mayonnaise, a splash of lemon juice and soya sauce.
Top with a sprinkle of roasted black sesame seeds.
Drizzle teriyaki sauce ( soya sauce and maple syrup) on top.
Perfect for packed lunches, picnics or as a meal in themselves.