You need to know their INmate number, which can be found through a direct link right here: https://kdocrepository.doc.ks.gov/kasper/search/disclaimer
Sending Money To Someone In Prison
What Type Of Things Can People In Prison Buy?
For Kansas, the kinds of things a prisoner can buy is actually pretty extensive; you can see the Kansas government website here: https://www.doc.ks.gov/facilities/canteen or click on the example picture below.
The things you can buy are food like decent pasta meals, shoes, toothpaste, clothing and electronics like headphones, etc.. you can see the list below.