Lego stores run a monthly in store building workshop of a small Lego character. The lego must be built in store, but is completely free. I went a couple of days with my son and he had a great time.
This is what you will be building:
The dates for September are September 1st and 2nd.
You must register for a time slot to participate. Registration can be fierce. Registration started at 9am yesterday and is completely gone for my local store.
Hopefully you can still register at your local store