Solid 3D Shapes Worksheets - Math Worksheets 4 Kids Nets of 3D Shapes. Students of grade 4 through grade 8 batten down the hatches and prepare for a raging storm of exercise in these nets of 3D shapes worksheets. Identifying the 2D nets of flattened 3D shapes and figuring out the 3-dimensional shape resulting from a folded net are the two essential skills emphasized in these handouts.