Do you want to know what is this special mask for? Without it, you will be able to see a beautiful puzzle full of details, but with this special mask, you can find many animals of the forest and extra hidden scenes that you could not see with the naked eye. That´s why, this puzzle has a lot of details to discover! What is hiding behind the tree? Age: From 3 years old. Features: - Puzzle contains 24 large and thick pieces. - Special discover-the-details-mask included.