Cut open glow sticks and dump them into bubble solution to make glow in the dark bubbles.
Ring someones doorbell and when they open it pretend they're the one who rang the doorbell.
When someone knocks on your door, open it then half a second later, close it, then walk away...
Hide in a cabinet in Ikea, and slam the doors closed every time someone tries to open it.
Have a friend sleep over. Wake up before your friend, put your face really close to theirs, open your eyes really widely, until they wake up.
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