Is it open on Sunday?
I'm not sure but you can call them or e mail them.
Their info is here in Tripadvisor.
Or you can always make your hotel to arrange a visit.
The owner has amazing stories of her trips inside Peru.
Get quick answers from Artesanias Las Pallas staff and past visitors.
3 Days in Lima
Lima in 3 days (for middle age)
One day in Lima