The £400,000 permanent exhibition was developed in association with Aardman Animations and features some of the company's classic characters including dynamic duo Wallace and Gromit who are 20 years old on Wednesday. To celebrate, the exhibition will be just one attraction at a ticket-only event hosted by @Bristol with Aardman on November 14.

Guests can enjoy a series of workshops with Aardman animators, appearances from Wallace and Gromit, film screenings and much more.

To get your hands on a pair of tickets for this special event look out for 'golden tickets to the moon' hidden inside Wednesday's Bristol Evening Post. There are 300 pairs of tickets up for grabs.

The exhibition also allows people to create their own short animated films. Now budding Nick Parks can enter their creations into this season's leg of a year-long Animate It! competition. Winners of the heat, which closes on December 31, will go through to the grand final next year for a chance to win a golden Morph.

Emma Cook, exhibition manager, at Animate It!, said: "We're really encouraging people to bring in their own props to animate. It's a sure-fire way to draw the judge's eye. People are doing some really complicated things. One girl brought in her collection of Sylvanian Families to make a sports day film. About 20 characters had to go from one side of the screen to the next. Not many animators would attempt that!"

The competition will run every year for as long as the exhibition is open. This is currently three years but Miss Cook hopes it will be longer. She said: "It's incredibly popular. During this half term its been full. You can feel the buzz of creativity."

Each of the 300 vouchers is valid for two people and gives access to @Bristol on November 14 between 10am and 6pm. Full instructions will be on the voucher.

Readers who find the voucher will have to claim tickets by 5pm on Friday, November 6. Any claim after that date will not be accepted.

The vouchers will be inserted by the Evening Post team at random throughout the circulation area and will include home delivery customers. Standard Evening Post terms and conditions apply - see public notices in the newspaper on Tuesday or log on at www.thisisbristol.co.uk/competitionrules.