This is one of Fortnite’s easiest challenges ever. To complete it you have to make a bouncy ball bounce 15 times. All you have to do is know where the Bouncy Ball toy is, and you’re good to go.
Unlike most challenges, which don’t start until you get into a match, this one starts in the game’s menu. The first thing you’ll need to do is go to the Locker tab. Next, select your emotes and scroll down until you see the Bouncy Ball — it’s a green ball and a blue quality toy.
Equip the emote, hit play, and start looking for a match.
Once you get in a game, pick a place to land that’s far away from the bus path, and start flying there. When you land, farm up until you have at least 60 of one material and build a box — four walls, a floor, and a ceiling are all you need to complete the challenge. After you’ve finished your box, select the Bouncy Ball emote and use it. The ball should bounce around your box about 30 times. Once it comes to a stop, you’ll get credit for the completed challenge.