Ages 2+ Children can create a variety of small structures with these wooden nuts and bolts. Complete with 4 different bolts paired with geometric nuts, kids can incorporate the pieces into other construction or mechanical play environments. While they grab, twist and sort the pieces, hand-eye coordination and fine motor skills are stimulated.. Sustainably made in Thailand with chemical-free rubberwood trees, formaldehyde-free glues, organic pigments, and water based dyes.