2 chairs + loveseat + blanket = baby fort!
Little c loves to play under our dining table and chairs. Setting the chairs up in the living area was so exciting for him! He crawled under them and used them as support to walk around them. I extended a blanket over the chairs and onto the loveseat. Little c crawled right under and went straight for the chairs. I got down on all fours and crawled under the blanket with him. We played a game of baby chase mommy around the couch and through the 'tunnel' that the blanket made. He eventually pulled the blanket off the chairs and soon our fort exploration turned into a game of peek-a-boo "Where's c...?!?" (his favorite)
Such simple items around the house can make for so much play and interaction!