If you and your baby are home before your mate, the activity/game of the day is to build a simple fort with a sheet draped over a large table and wait to be discovered. I recommend strategically placed binder clips to secure the loose edges.

Milo thinking that the fort is only slightly better than peek-a-boo
To make it fun for the baby, bring pillows and small toys in with you.
To make it funny for you, make sure you’re in there hiding when someone gets home.
Hilarious.
Send us any pictures of your attempts. Partial credit is always given!