Ravensburger Puzzle 368

Imagine you and your family have won a night at the natural history museum. On reaching the home of the Brachiosaurus you suddenly hear a loud crunching noise!

What is it? Can you discover what's making that strange and scary sound and then Exit?This Exit Puzzle for KIDS mixes a richly-illustrated 368-piece jigsaw, an exciting storyline and 6 mathematical riddles hidden within the jigsaw image. 

Once you've assembled the puzzle, you need to solve the riddles and "Exit"!  A little tip - the puzzle image isn't identical to the box image.  Those little changes may help you solve the riddles. 

Supplied with instructions and solution envelope, Exit also comes with a unique QR code to help you solve the riddles.  Riddles graded at 3/5; medium level.