If you are stuck finding an object you can use the locate spell to find one for you every minute or so. There are 180 dream jewel pieces in total, however you only need to collect 150 of them in order to beat the game However, where ever possible this walkthrough will show solutions to both casual and challenge modes. This walkthrough was created while playing through challenge mode, where the puzzles are slightly more difficult and you can not skip them.
Dream Chronicles: The Book of Air Walkthrough