Begin by drilling a hole in the bottom of your plastic horse. It’s best to use a grip or vise to hold the horse while drilling instead of just holding the horse in your hand. Safety first.
You only need to drill about 1/4 of the way into the horse. That will be deep enough to secure the drink stirrer.
With the horses drilled, coat them evenly with gold spray paint. (If you anticipate that the horse will come in contact with your drink, use a food safe spray paint.)
When the horses are dry, add a bit of E6000 glue to the top of your plastic drink stirrers and insert one into each of the pre-drilled holes.
Allow the glue to dry completely, and your Horse Drink Stirrers are ready to go.