Buy game as gift to someone without a steam account

[krimark]

My mother is over 70 and she loves to play Zuma. She used to have a copy of it installed on her old computer that recently had a disc failure. She now has a new computer but misses playing zuma so I thought I'd buy it for her but the only place I've been able to find it is on steam. Now I have a steam account but I have no intention of installing steam on her computer or registering her for an account. She gets stressed out from applications running on her computer showing notices. Can someone please tell me what I must do to buy Zuma and give it to her without having to register her for steam account and installing steam on her computer.. -.-

[Astraea Kisaragi]

Buy a non-DRM version for her. Search arround sites like Gog.com.

[HEART]

Zuma is not exclusive to Steam. Does she have a mobile phone?

[krimark]

Thanks for the replies.

@Astraea: I've tried searching for a non-steam version to purchase but I haven't been able to find one
@MiSOKA: Not one she plays games on. The screen is too small for her eyesight.

[Sansei Muramasa]

If you want to buy a game that doesn't require a Steam account go to Gameflip, GOG.