If she’s a heavy sleeper who gets grumpy when woken up, stick to "passive" pranks (like the stuffed animal zoo).

Meet our protagonists, Big Brother (or sister) and Little Sis. They had always been close, but their competitive spirits often got the better of them. Little Sis had been looking forward to a relaxing evening in her room, but Big Brother had other plans.

The hallway was a dark canyon, lit only by the glowing green numbers of the microwave in the kitchen. Ten-year-old Leo, known tonight as "The Shadow Stalker," adjusted his night-vision goggles (which were actually just plastic swim goggles tinted with green marker). His mission: a surprise "Night Attack" on his little sister, Maya.

The key to any night attack is stealth. Whether your goal is to sneak into your little sister’s room to leave a funny surprise or to jump out from behind a door, you have to master the "ninja walk." Sneak in without creaking the floorboards.

No jumping off bunks or using anything that could actually cause a trip or fall in the dark.