What's my tip or lunch box inspiration? Because kids are little, I make bite-sized portions. For example: sandwiches -- my child usually get messy and eventually becomes bored if I give him a whole sandwich to eat. What I do is use cookie cutters and make shapes out of them. It gets kids attention and they'll eat it. I usually just consume the leftover cut-out portions. And another idea is that you can roll up ham and cheese sandwiches like sushi. Small bite-sized portions is easier for my little one to eat and less messy too.
I just love those bento lunches where you can make fancy designs or make a character face out of that you can eat it. It's like food art. It's pretty neat and it puts a smile to your child's face. :)