These models are designed with a clear view of all the moving mechanical parts like gears, wheels create a unique, unforgettable and fascinating look miniature models. Best suitable for 5+ or require Adult Supervision. kids can assemble and paint it to make it personalized. Use markers, colored pencils, brush colors or crayons to add some color and style to your Fidget miniature. These pieces are fine cut which allows glue less assembly. Still, you can add some glue dots to the joints to make it permanent assembly.