Simple, cheap, realistic and amazing maths and engineering resources. Please ensure you supervise.
Types of Screws and Bolts [Guide] More
Make your own robot w/tin cans, nuts & bolts, washers, magnets - this was a centerpiece for a banquet, but I'm thinking fine motor/science-magnet center!
Nuts, bolts and washers
EPMAN Valve Cover Washers Kit for Honda D-Series Red, Golden, Black, Silver, Blue,Purple,Green,Gunmetal EP-DP008 Engine Dress Up for Honda D Nuts Bolts And Washers Online with $2.93/Set on Tanskyturbo's Store | DHgate.com
Old guitar case made into a shelf with L brackets, bolts, washers and nuts.
sharing out the nuts and bolts activity for kids
Developing fine motor skills with nuts and bolts
different types of fasteners | Visual Glossary Of Screws, Nuts and Washers | DO IT: Projects, Plans ...