This market in Donghuamen street, which opens everyday from 3-10PM, is worth a visit if you're in Beijing. Founded in 1984, the market offers snacks made of insects and typical Chinese ingredients. It's one of the most unusual places in the capitol, and very popular.
Tourists love to take photos of the insects and typical red lanterns that hang from the stalls. If you're picky, this isn't the place for dinner....skewers of grasshoppers, crickets, scorpions, worms, snake, chicken hearts, kidneys, etc, although there are lamb skewers, grilled beef, stuffed eggplants, noodles, tofu, grilled corn on the cob....it's a giant spectacle to watch the venders prepare the insects and tea.
Panjiayuan Market is the best place you can go to on either Saturday or Sunday. Here you can find all kinds of crafts and curiosities at good prices. You can buy all sorts of Chinese objects: calligraphy, souvenirs, antiques. Above all it's a perfect place to go and look at not only the products but also the people to see the way in which they behave but also how they eat and live.
This Flea Market is a large complex called Panjiayuan. There you will find all kinds of products, ranging from antiques belonging to older generations as well as many embroidered objects from Tibet, traditional tea cups and hand painted furniture. Prices vary according to the your bargaining skills. At first you will be offered a price that is inaccessible but it will go down. It is said that you can get more variety and better prices with the Tibetans products in Tibet itself. A good way to spend the morning ( it opens early, and during the evening there are too many tourists).