As of 2015, some good toy box patterns include one with a lid found at Ana-White.com and WoodworkersWorkshop.com. Both of these websites offer free plans to build toy boxes.
Ana-White.com features a toy box plan that includes a lid. This website offers photos of the completed toy box along with decoration ideas. There is a materials needed list and photographs of the various steps in construction. There are also drawn instructions that include measurements.
WoodworkersWorkshop.com offers links to rolling toy crates, bins and toy boxes with themes, such as trains. Most of the plans are free to builders. Each link features the name of the toy box project and a brief description of it.