Activity Projects for Christmas:

Make a doghouse out of a sheet of black fiberboard.  Make a mock-up out of a sheet of white foam from the dollar store first, if you want.

Make an adobe pueblo for mice out of mud in your back yard.  Dry it out for a week and cook it on your barbeque!!  

Construct a playhouse out of 2x4's and 1x2's.

Good family project!  

Suspend a mattress from a frame under a tree and sleep out at night.  

Make a path out of red bricks through the garden.  

Add an irrigation system.  Use white PVC and screw tops you can drill 1/64" holes through.  That way you can turn the cap until it hits your greenery just right, and if, at some time, you don't need water there, you can replace the cap with one with no holes in it.  (Or put gum or caulk in it.)