1. Make an aquarium.
Car submerged underwater? No problem! Throw some fish and some food in there and you are now the proud owner of one expensive aquarium. As a bonus, you may get to see the look of surprise on your insurance company representative's face when they see that your car has tropical fish in it!
2. Go diving.
Grab your snorkel and your pirate hat as you go on a deep sea adventure to discover the lost remains of your once great city. Search the bottom of the watery depths for the forgotten treasures that they hold. Go with a friend so you can slowly turn on each other as greed overwhelms you both, leading to a cool underwater fight scene. For a small fee, you can travel along the Eastern Seaboard with Nicolas Cage, his forehead, and The Declaration of Independence to find the lost Masonic treasure.
3. Play board games.
Board games. A classic staple in good old-fashioned family fun. Make sure you continue that fun by being as aggressive as possible regardless of what game you are playing. If you are playing Risk, make sure you attack every turn even when you know you shouldn't. For Monopoly, be cutthroat and act as smug as possible when someone lands on your favorite property. If you decide to throw a little real money down and play poker, make sure you go all in every round. Your family will admire your resilience and drive, and will want to continue to play board games with you in the future.
4. Build an ark.
It may be a little biblical but besides Raiders of the Lost Ark and Steve Carell's Evan Almighty, where else have you seen an ark? Grab whatever driftwood you can and start building this thing. Make sure you have your rabies shot because here comes the tough part: grabbing two of every dog, cat, hamster, frog, squirrel, bird, and opossum and putting them on that boat. Don't feel like rounding up all of those critters? Load up a generator, a boom box, and have your friends swim for their lives to your brand new party barge! It's a party of Biblical proportions!
5. Build a raft.
I know, build another boat, but this one is different. Made out of your hopes and dreams, and held together by your little sister's Barbies' hair, this raft is more personal. Float down the bayou and make memories worthy of being written about by Mark Twain. Bring aboard a volleyball so you can make endless references to Tom Hanks in Castaway for limitless fun! You can watch your beloved volleyball pal float into the sunset on your raft while shouting "I'm sorry Wilson!" After all, the hardest part is letting go.
