My parents know that I like spicy food, and they gave me chili plants as a birthday gift.

A good gift if you don't already have any, they look like they need to be re-potted in to larger pots. Also look into pruning to encourage more growth.

r/hotpeppers would be a good place to get some help with those.

That's adorable.

They look rather healthy but need more room to grow or you'll stunt their growth. What variety are they?

I try not to give gifts that require maintenance. Like plants and puppies.