• Use your fine motor muscles to screw and unscrew these Jumbo Nuts and Bolts Set For Preschoolers 
• Put the large plastic nuts and bolts into the Skoolzy drawstring backpack to keep all the pieces together.
• 12 Complete Plastic Nuts and Bolts Set  help teach children colors, shapes and basic mechanical engineering on how parts fit together.
• A great starter STEM toy for toddlers -  different shapes and colors.