My kids are Indonesian so they like all Indonesian food and your kids probably would to, but like you we tend to keep them away from anything spicey. Give them all the foods you like especially stuff like tempeh tahu and rice various egg dishes like telor dada and chicken will also be ok for treats give them Es cendol and i am sure you will be ok. If you are in doubt eating out simply ask "ini gak pedas kan ??" or "buat anak2 nih jangan pake sambal sama sekali"