That’s 10 special kindergarten readiness and nature fun and learning activities for fall. Den rhymes with 10, as in an animal den or home. At this time of year many animals are looking for and making homes.
Animals can have all kinds of homes. What kinds of animals live under rocks? Help your child turn over a few to find out. 
There are often many interesting kinds of bugs and other crawly critters. Besides on the ground, homes can be up high. There may be some bee hives to see.
If there are any trees in your area, see if there are any squirrels or racoons that may be making a home in the tree. 
Sometimes, even tree stumps or fallen logs can be homes for small creatures. There may be some empty nests. Where have the birds gone? Look very closely in case there is a tiny, carefully hidden fairy house!
A special story to read at this time of year is Mousekin’s Golden House, by Edna Miller. A little mouse makes a den inside a jack-o-lantern after Halloween where he sleeps inside all snug and warm while the fall wind and winter snow blow outside. The story also shows other animals looking for homes in the mud around the pond.
The Earth is a big den for many animals, and people too. What other animal homes can your child find?