Your search for "jumbo nuts and bolts" revealed the following:

12 pc Jumbo Nuts and Bolts Set With Tote

12 pc Jumbo Nuts and Bolts Set With Tote

geometric shapes building, learning blocks shapes

7 Jumbo Geometric Solids 3D Shapes for Kids

construction set

30 pc Joint Construction

Lacing Beads For Toddlers

Rainbow Stringing Beads for Toddlers 30 Pcs