Here are a few ideas of what to create with empty cardboard boxes. Many of these activities meet ECERS-R Dramatic Play subscale and ELS Curiosity and Initiative Domain in Approaches to Learning Standards for and children.
A 100% SAFE way to make kids bath water glow. No highlighters. No harmful chemicals. All you need is ONE ingredient found in almost any grocery store. It is 100% edible, safe for kids, and even made for ingestion. (Glowing bath water is just TOO FUN not to try when made in this way)
I used this approach with son it didn't work out very well-he's extra sensitive and wants a warning before every consequence... is being told NO when needed and he's much more flexible & happy, a little balance between the extremes is what's needed
101 Things to Do When Kids Say "I'm Bored" Nix boredom in the bud with this list of fun (and low cost, low stress) activities to keep your kids occupied and happy. http://www.care.com/child-care-101-things-to-do-when-kids-say-im-bored-p1017-q39171288.html