Who needs expensive Photoshop subscriptions and fancy drawing hardware? 91-year-old grandma Concha García Zaera creates and sells beautiful and insanely detailed masterpieces using nothing but a mouse and Microsoft Paint.

Zaera’s artwork, which is all put together using a Windows 7 PC, has attracted more than 300,000 followers on Instagram. It features everything from serene and colorful landscapes to cute and cuddly pet portraits.