Mnn as long as this place is somewhat insulated, they'll warm up with enough exposure to the sunlight. What'll be most important is that nothing casts shade on them.

[Gokudera tries to make the light bigger, but he's just making the barrier around it larger, which diffuses it and makes it less intense. It is getting warmer against his palms, but it's also the size of a volleyball.]

I'll take them if you're going to put them in the cold.

[Not that he'll take care of them. He may end up neglecting them, but he wants to test out his green thumb... if he has one.]