Rivers could be climbed
Babies could race
Extreme sledding could take place on ski slopes
Kids / families could do "tough mudders" obstacle courses
Bikes could be on railroad tracks
Climbing skins could be applied to skis
Floating obstacle courses could be on water
Maps could show swim, hiking, climbing, and surf spots
Panoramic vision or optic flow could reduce stress
Boats could have hot tubs and/or spas
Parks could have roller skating discos
Hovershoes / hoverboards could be ways to get around
Jogging / walking could be combined with picking up litter
Scuba diving could be snuba diving
Swimming pools, basketball courts, private gyms/studios, etc. could be rented out
Bees, goats, rabbits, and/or chickens could be rented
Adults could have playgrounds
Surfing could be on lakes
Biking could be across ice and snow
Hunting could be with a lens
Skiing could be snow-free
Bamboo bicycles could be built
Redwood trees could be climbed
Treks could be on the sea floor
Karaoke could be in front of a huge crowd
Ice skating could be on snow
Wilderness or warming huts could provide a nice break
Glasses could have no arms
Volleyball could be played like foursquare
Surf competitions could take place on artificial waves
A floating bicycle could pick up trash in water
People could fly above water
Snowshoes could be inflatable
Kayaks and canoes could be foldable
