Well, now you'll just have to get an iPad
Well, I cheated. Yes, it was the maze. From the lack of sleep at having a 5 month old baby, I knew I couldn't concentrate enough to do the maze on my own so I looked up the solution online.
Did the casket game myself. No real method, just kept clicking on random ones until I got the combination I needed so I could close them all.
Did the telescope - I remembered the first word and after that it only took me a few tries.
If I recall, there's another one in the library - something with the books or something? Don't remember - I'll look for that to tackle next.