Here is a great resource for foods high in potassium. Most fruits, roots and leaves are great sources for potassium + nature's multivitamins. Sweet potato fries with low/no salt and orange juice to drink are an accessible & kid friendly option on the go, and cover 30-50% RDI. Diabetics need to watch for phosphorus & sugar; GI people for fodmaps; for the rest of us, why not?

https://whfoods.org/genpage.php?tname=nutrient&dbid=90