In seasoning, instead of chilli sauce, you can also add the tomato ketchup.
2. Try to do brining the chicken pieces the before night to make it tender and for best results of chilli chicken. If you are short of time, atleast do it for 1 hr and keep in fridge then prepare as ususal.
3. To get the bright red color to the chicken you can use the kashmiri chilli powder. If unavailable, you can use edible red colour.
4. Soya sauce already contains salt. So check before adding the salt.
5. You can avoid or reduce green chillies, when giving to children, as chilli sauce gives enough spiciness.