Play a prank on a friend
All Terrain Vehicle Riding
Go Bird Watching
Go Bungee Jumping
Go Dirt Biking
Fishing - Whether it is deep sea, stream or fly - fish on!
Go for a Helicopter Ride
Go on a Sightseeing Plane Ride
Hot-air Balloon Ride
Go Scuba Diving
Ride a Roller Coaster
Go Cliff Jumping
Climb a Tree
Go Rock Climbing
Have some fun with your lover - get some ideas here
Go Whitewater Rafting
Surfing / Wakeboarding / Water-skiing or some kind of adventure
Rent or get a ride in a convertible
Geocaching GPS - Using a GPS you can search for treasure boxes that are hidden all over the world. Lots of fun and a great way to discover nooks and crannies of where you live.
GPS Adventuring - Go adventure somewhere with your GPS and mark your trail on your GPS as you go. No matter where you go you will find your way back.
Bike Around Your Local University Campus
Bike off a Dock Right into the Lake!
Shoot Some Hoops - you know - basketball hoops
Ride a Tandem Bike
Go on a Bicycle Tour
Go Mountain Biking
Go to a National Park and find a cool hiking trail
Fun Fitness - Start a fitness program based around only fun activities that give you a good cardio workout.
Jog at sunset with some really cool music on your Ipod
Have a Big Party - Party Appetizers, Party invitation - oh wait do you need a party idea? Go Here for Party Ideas
Learn to Juggle
Go Roller Skating
Enter a Running Race
Run a Mile
Steep Run - Run down the steepest hill you can find,
Go for a Look for Cool Rocks Hike
Play Ping Pong
Do a round of Speed Golf - That is golfing as fast as you can.
Swim - with a bathing suit on or off - it's your choice.
Swim at the Bottom of a Waterfall
Get a new bathing suit or bikini and go Swim in a Pool
Go Swimming at the beach - at the lake or ocean
Bury a girl in the sand and give her "Extra" bits
Bury a guy in the sand and give him breasts
More Spontaneous Fun Things to Do
Triathlon - Train and enter for a triathlon.
Go for a Bike Ride
Relax - Hammock Time Spend the Entire Day by Yourself relaxing- unplug the phone, have a bath, read a book - whatever you want to do. Make sure you delte potential irritants. More ideas here
Have your own Olympi Games - Set up a series of events or obstacles courses. Only limited by your ability and imagination. Take it the extra step and arrange some medals for the awards ceremony.
Bounce on a Trampoline
Have a Wheelbarrow Race
Blueberries up Your Nose - - Ok this one does sound weird but it is still pretty fun. This is a contest where you stick a blueberry up your nose and try to blast it the farthest. ( see other strange fun ideas)
Play Some Boccie Ball
Have a Bonfire and Roast Marshmallows
Have a Big Scavenger Hunt with your friends - post all your clues on Twitter
Get Some Firecrackers - Remember Safety First
Have a Fondue or Make a Banana Split (other food ideas here)
Take Photos of Pets in funny hats, or glasses
Get tanning and soak up some sun
Start a Herb Garden
Have a Pillow Fight
Have a Water Fight with the Garden Hose, water balloons or water guns
Listen to Some Rock Music from a Totally Foreign Country
Have a Limbo Contest
Have a Paper Airplane Distance Contest
Photography - Get everyone to express the same emotion in a picture. Anger, confusion, glee, uneasiness, seduction etc..
Have a Talent Show - take some video with a digital camera and put it on Youtube
Plant a Time Capsule or something else creative
Cloud Evaluation - Look for shapes in the clouds
Instead of spending money on airfare or a hotel room - have a backyard vacation
Start a diet plan and a workout routine
Slip and Slide
Watermelon Seed Spitting Contest
Research - check the local paper for special events.
Play Spin the Bottle
Have a Lemonade Stand
Try Stilt Walking
Favorite Tunes - Music Make a list of your favorite songs then make a CD
Baseball or just play some catch
Have a Three-Legged Race - If you have a lot of people you can play three-legged soccer or three-legged baseball.
Build a Tree House
Tricycle Races - Kids or adults can have fun this one. Make sure everybody wears a helmet.
Learn to Ride a Unicycle
Instead of a campground just Camp out in the Backyard
Have Christmas in July
Draw with Chalk on the Sidewalk
Have an Egg Toss
Do a Headstand
Play Fun Questions
Take your bed outside when it is really hot at night
Play a sport like - Football or baseball
Messy fun thing to do - Food Fight
Do arts and crafts outside
Get up early and watch the sunrise
HAve a FUN Marathon - do fun activies from sunrise to sunset on the longest sunshine day of the year
Have a cool picnic
Throw a Frisbee around
Fun Outdoor Summer Actvities