Build your own giant lego toybox! Free step by step plans!
Here is the original site where this is posted. http://thriftydiyprojects.weebly.com/lego-box.html 
1 - 4 x 8 Sheets of 3/4" Surfaced Plywood.
1 - 8 foot long 2x2.
1 gallon of Indoor Paint (color of choice)
1 - 16 oz bottle of Wood Glue
4 - rolling casters, or Wheels. If you want it to be Mobile.
2 - 10" x 10" Lego building Plates
Plywood Cuts -
2 - 18" X 10 3/4" end Pieces
2 - 34 3/4" x 10 3/4" Side Walls
2 - 34 3/4" X 16 3/4" Base & top Plates (NOTE: You may wish to cut one of the top pieces 1/4" less in width/height to fit easier in top as noted in plans)
24 - 5 1/4" Diameter Circles
2x2 Board Cuts -
6- 9 1/4" Long Boards (Lids supports)
Please read through the entire plan and all comments before beginning this project. It is also advisable to review the Getting Started Section. Take all necessary precautions to build safely and smartly. Work on a clean level surface, free of imperfections or debris. Always use straight boards. Check for square after each step. Always predrill holes before attaching with screws. Use glue with finish nails for a stronger hold. Wipe excess glue off bare wood for stained projects, as dried glue will not take stain. Be safe, have fun, and ask for help if you need it. Good luck!