Various types of DIY projects can be done to update a dull backyard. A fun project that you may want to do is build your own homemade pallet swimming pool.
DIY Swimming Pool From Bales Of Hay I don't know about you guys but I can't afford a swimming pool. I can't even afford an above ground swimming pool either. That being said, I do have access to free hay from my dads farm.
I would never have believed it, if I had not watched it all the way through... Build Your Own Cardboard Swimming Pool DIY Howto