1. Fill Leo with Goodies Find the trumpet-shaped end, or cross-cut holes on the side and/or bottom of the toy. Push in the treats. 2. Connect Leo Toys Fold the trumpet-shaped end of one toy and pop it into the cross-cut hole of another. Each toy has two cross-cut holes so you can make all sorts of fun configurations for your dog. 3. Multiple Leo Toys When you attach several toys together, their hollow spaces become interconnected. That means treats can transfer from one toy to another - potentially limitless entertainment.