At MooWP, another way to acquire objects is to go shopping. You can buy various kinds of objects in stores around the moo. The MooWP cafe sells food and drink, for example. Instead of creating your watch, you could buy it at the Jewelry store there. There is a limit to how many objects you can make, however.
All users have a certain amount of bytes of datebase space they can take up.
If you are using your quota to make something, rather than just accumulating dozens of watches, you can probably get the people who run the moo to give you more quota. There may be things on there that you made by mistake and forgot.