Shopping in Venice
If you are looking for something to do in Venice besides churches, galleries and boat rides, you could always taking a look at the shopping scene. Venice is full of tiny little shops on nearly every street so you could easily fill up a chunk of time just wandering through all of them.
Venice is well-known for its fresh fish and produce, and you could easily spend an hour or so wandering through the markets near the Rialto Bridge. Walk around and see what is on offer to sample, and soak up the local atmosphere where many Venetians do their usual shopping. Find somewhere close by that is doing cicchetti- it will be hard to find it fresher than by the market itself. If you want a 'foodie' souvenir, try somewhere like Giacomo Rizzo, where you can find pasta in the shape of all sorts of different Venetian icons.
If you are in town at the right time, you could go check out the Mercatino dell'Antiquariato (Antiques Fair). This market happens three times a year (generally the first weekends of April, September and the week before Christmas). Here you will find huge arrays of different wares in over 100 stalls. There are ranges of oddities, antiques, and Venetian goods, all at different prices, ages, and levels of quality. Make sure you get here nice and early in order to snatch a bargain.
Here are some excellent souvenirs ideas and where to buy them in Venice.