Download the image you want to make a stencil for. Cover the entire image with packing tape, on both sides of the paper. Leave at least 2-3" of packing tape extending past the image, as well. Cut the black parts of the stencil out, using your X-acto knife (on a cutting mat or cutting board), or small sharp scissors (like manicure scissors). USE :)
How to Drill Pebbles and small beach or garden stones by Eternal Tools. This follow along tutorial is full of tips and makes drilling holes into pebbles nice and easy. It shows the equipment you'll need, top tips along the way and some inspiring work by other artists who use pebbles and stones in their jewellery and craft work.