Argos is offering a 2-for-1 voucher for Alton Towers, Thorpe Park, LEGOLAND Windsor or Chessington World of Adventures with any purchase in selected stores between March 21 - 27, 2012.

The 2-for-1 voucher is valid with any full paying adult and must be presented at the ticket booth on the day of your visit.

Argos usually sell a range of cheaper items by the tills so you don't have to spend very much at all to obtain the 2-for-1 voucher.

The voucher can also been used at LEGOLAND Discovery Centre Manchester, Madame Tussauds London and Blackpool, UK Sealife Centres and Sanctuaries (excluding London), The Dungeons Edinburgh/York/Blackpool/London, Warwick Castle and The Blackpool Tower.

The following block out dates apply:

• Alton Towers: Nov 2- 4, 2012.
• Thorpe Park: Apr 6-9, Jul 2-6, Jul 9-13, Jul 16-20, Oct 26 - Nov 5, 2012.
• Legoland: Mar 24-25, Oct 27- Nov 4, 2012.
• Blackpool Tower and Blackpool Dungeon: Oct 27-Nov 4,2012.
• London Dungeon: Oct 31, 2012.
• All attractions: Dec 25 and all special events, hotel events and concerts.

You can also input your receipt number on the Argos website to be entered into a prize draw to win free theme park tickets. If you aren't a lucky winner you can download three more 2-for-1 vouchers instead.

From March 27 - April 17 you will not be given a voucher in store but you can still get your 2-for-1 vouchers by entering your receipt number into the Argos website and then downloading and printing them off.