an inflatable transparent ball floats on the surface of a reservoir on the ruskeala waterfalls in a forest under a blue sky with

activity agility background balance ball balloon black blue bouncy bubble chain cheerful childhood clouds concept courage crazy danger day entertainment falling floating floats forest fun game inflatable insurance isolated karelia nature photography playful playing prison prisoner problem reservoir river ruskeala russia sky sphere sphering sport stability summer surface transparent trapped vacation walking water waterfalls white zorbing