I wish I had a photo to go with this. In the front, left corner of our yard, beside Mrs. Beverly's yard, were two large sweetgum trees. One summer day, I decided to dig a hole under the trees, to give me a fun place to play with my toy dinosaurs. I began digging, but as soon as Gary noticed, he decided to take over the project by sitting in the middle of the hole.
After quite a bit of protest (Mama! Make Gary move!), I gave up, and moved a few feet away to dig a second hole. Those two holes remained there for a very long time, and were the location for adventures with dinosaurs, army battles, several forts made of sticks, experiments to see if insects could climb out of them, etc.