Now that you have your cute bento box (see this post) it's time to get some cuter-then-cute items to decorate them with! I found all of these on amazon but your local Japanese market will also have some fun selections.
1- Everyday Bento: 50 Cute and Yummy Lunches to Go
2- FoodWorks - Silicone Ice Pop Maker Molds
3- Stainless Steel Vegetable Cutters
4- Crusty's Sandwich Cutters, Set of 5 Fun Shapes
5- Pantry Elements Silicone Baking Cups
6- CuteZCute 10-Piece Bento Decoration Box
7- CuteZCute Mini Condiment Mayo Container for Bento Box