When you Scream Yippee, you bestow upon yourself a magical enhancement.
During this time you have the ability to use an invisible mage hand to assist you with Sleight of hands on anything within 15ft radius.
Doing so gives you Advantage on Sleight of hands checks

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can Increase the Range of the radius by 10ft for each slot level above 2nd.