Toys are just great decorations. It's a good way to show your interests and make all that empty space visually interesting. Like here:
And here:
And also here as well (though a more up-to-date version of this one would have Pinkie Pie and Sweetie Belle in it):
And, if you're
like Tai, maybe sometimes you think about, if Toy Story is accurate, what do they do all day? What sorts of conversations do they have? Do they keep in character, or will heroes and villains converse amicably? Are they proud to be decorations, or disappointed that I don't play with them? The possibilities are endless~
Anyways, long story short, they're just another thing for Tai to spend money on, and that's always nice. =3