The Peeks of Chaos contains 3 peek devices, each using the card box: the “Mockra Peek”, the “Meanas Peek”, and an updated version of the Meanas Peek.
The updated version also allows for you to store 2 billets in the box, while only showing 1. This can be used for multiple outs, or to cause writing to change, appear, or vanish from a billet.
All the methods will work with playing cards as well.
Each method is very deceptive, and the peek happens at a natural moment, with no funny movements.
These are each DIY devices, take 5 – 10 minutes to construct, and you probably already have the required materials.