Diana, a couple of neat ideas on this one! The sign pointing in all directions (like the one you have kind of!), the sack race bags Jessie or someone had I think, and the ducky game would be perfect for little ones.
Recycle old water bottles and grab some cheap pool rings. You could color the water like the rings too make a more challenging match/ring toss games for the older kids. Add glow sticks for night time ring toss