Question: where is the tiny rubber ducky hidden in the summertime splashdown loading screen?
Answer: One of the 14 Days of Summer challenges asks you to "Search the Tiny Rubber Ducky at the Spot Hidden in the Summertime Splashdown Loading Screen". You can find the Tiny Rubber Ducky at the coordinates H9, I9, H10, I10. These can be found just below Paradise Palms.