Disneyland plans to launch a parkwide game this summer that will send kids scrambling to find clues and solve puzzles all over the Rivers of America and Tom Sawyer Island.

Mickey’s Park Rangers is coming to the west side of the Disneyland Resort for Kids Rule Summer, according to Disneyland officials.

The Kids Rule Summer campaign is tied to a steep ticket discount good from May 22 through Sept. 7 that lets kids ages 3 through 9 parkhop between Disneyland and Disney California Adventure for $50 a day.

The new Mickey’s Park Rangers scavenger hunt is coming to the Disneyland Railroad, Sailing Ship Columbia, Mark Twain Riverboat, Davy Crockett’s Explorer Canoes and Tom Sawyer Island, according to WDW News Today.

Scavenger hunters will gather stamps as they search for clues in the Mickey’s Park Rangers game and collect a sticker prize when they solve the puzzle, according to WDWNT.