Mukami’s Ma takes them all to a toy store and lets them pick anything they want! Or if they want something else (like Ruki), maybe a bookstore?

Admin Mawile: (ノ*゜▽゜*) Awww~

Ruki:

-He’s more than delighted that you’re going to be getting something just for him, and is determined to find a good value for your money. No matter what, you can’t be disappointed in deciding to get him something, especially since this is the first present he will have received since his family’s death. 

Kou:

-He can honestly hardly believe you want to get him something, and is so excited you practically have to keep a physical hold on him. What toy he gets doesn’t matter anywhere near as much as you being the one to get it for him, and he might try to convince you to pick which one he gets. 

Yuuma:

-The excitement of getting something new (and better yet, from you!!) quickly gets the better of him, and he bolts off after some flashy toy without a moment of concern for the price. He only realizes how much it cost you after the purchase is done, and will need some reassuring that you wanted to buy it. 

Azusa: 

-It takes him ages to decide on something to buy, and he has to check every choice with you before even considering it. Since you’re offering to get it for him, the toy has to be something that you’ll like too. Even if you have to decide what he gets, he’ll love it all the more because it was chosen by you.