Where can I get some novelties?

Hint 1 of 17:

There's a place just for this purpose.

Hint 2 of 17:

It's the novelty "shop" on the docks in Ankh-Morpork.

Hint 3 of 17:

Although you can't get inside, the wall is kind of thin.

Hint 4 of 17:

All you need is something to knock it down.

Hint 5 of 17:

You still need a fair amount of force, though.

Hint 6 of 17:

Find something pretty heavy.

Hint 7 of 17:

Like a weight.

Hint 8 of 17:

There's a one ton weight in Holy Wood.

Hint 9 of 17:

And if you look at the docks, there's a way of getting the leverage you need
to use the weight on the wall.