How to build a DIY Kids Tool Box - free building plans by Jen Woodhouse
Katydid and Kid: A Kids' Tinkering Kit
Would you get this for your kids? A list of tinkering tools for kid-directed (no adult-hovering) play.
Wooden Kid Tool Box - Wood Toy Tool Box - Natural and Organic Toys for Kids, Toddlers, Children
Lots of free wood plans on this site
A mom occupational therapist reveals 50 items in her box to help children.
I think this set up is a excellent way for children to discover what each tool does and how it can aid in building.