If you have a broken terracotta pot lying around you can turn over half the pot so that the pot is a hollow tunnel. Line it with mulch and leaves. Water it often and keep it moist. Locate it in the shade, if possible, and near the pond. Frogs lay eggs in clusters.
Frogs have smooth, slimy skins.
Frog eyes tend to bulge. Frog legs are longer, used for jumping. Toads lay eggs in long chains. Toads have dry, bumpy skin. Toad eyes do not bulge as much.