Gift to my girlfriend - beginner DJ set

Hello everybody
My girlfriend said she would like a DJ set as a gift. She is not a DJ, it would be just for fun. I really have no idea on where to start from to decide what to buy. She already has laptop, headphones and speakers, what other kind of equipment she would need? Do you think I can afford to buy affordable basic equipment with about 400 USD?
Thanks
My girlfriend said she would like a DJ set as a gift. She is not a DJ, it would be just for fun. I really have no idea on where to start from to decide what to buy. She already has laptop, headphones and speakers, what other kind of equipment she would need? Do you think I can afford to buy affordable basic equipment with about 400 USD?
Thanks