I bought these mini cards so my 5-year old could have an easier time doing some magic tricks along with me. He really likes the cards, especially how two minis turned horizontally is exactly the vertical height of a regular card. Unfortunately, because the cards are from the same stock as regular cards (thickness), they don’t bend or flex very easily because the smaller dimensions results in having less leverage. Even for me, it’s quite difficult to do a riffle shuffle.
I’d still recommend them as a novelty, but don’t necessarily expect that they’ll be useful for smaller hands.

I really like this deck and the amazing plays or tricks you can do with it. It's so fun

Love these and the new slightly smaller size. Glad to replace the vintage minis I have.

These are good for a few ticks, one I saw over on The Scam Nation Youtube(formally Scam School), by Diamond Jim Tyler. The cards themselves just look like a mini version of a standard version of Bikes. The finish is a little different from standard bikes and doesn't have the linen feel to them, not that you would use them for any sleight of hand or cardistry.