You could say things like "where the mailman goes" or "under the third largest tree inthe yard" or "next to the green chair". You will probably want some harder than others. You could have one that has 2 directions in it such as "next to the tree next to the treehouse".
The simpler the better! "look up high where its green" for trees, or "way down low where the worms wiggle" for under dirt, or in the grass. Be descriptive, and rhyming when you can is always fun.
