Nerf Darts Mega XL Dart Refills 2 Pack Set - Bundle with 20 Nerf Mega XL Whistler Darts Plus Bonus Stickers | Nerf Darts for Kids Ages 8-12. This Nerf darts refill set includes 20 Nerf Mega XL foam darts, the largest Nerf darts ever! These Nerf darts even make a whistling sound as they fly through the air. Use these mega Nerf darts when playing outside with your friends. Aim at targets and knock them down with these huge Nerf darts! Sure to be a hit with kids of all ages, boys and girls alike, these Nerf extra large darts are sure to bring hours and hours of outdoor fun. Officially licensed Nerf dart refill pack for kids of all ages also includes Nerf stickers.