Cut the rope experiments free archievements

[Pvl123]

Hi there, I have a little problem with one of the archievements of free edition Cut the rope experiments.

How can I get 40 stars when There are only 3 levels packs with 4 levels in each pack? Each level includes only 3 stars. Which is 36stars totaly.

 

[hockey89]

does anyone know the answer to this?

 

[djayor]

Student Collect 40 stars

Same problem there. =|