Oh...
My...
God...
How could you leave empty handed??

The one that is so fluffy is a Mammillaria I think.
And the one above the fluffy one with purple stones. Mammillaria too I think
Take them both!! :D Soo many pretty ones! Get Mammillaria like @nikv say. They are easy to grow, love loooots of sun and have cute small flowers.

Or that big green ones with ridges and no spines just white spots... They are super easy to grow too and have huuuuuge white fower :)