Teaching a Puzzle Step-By-Step

I am trying to figure out the best way that I can work with my students as a whole group to go through some of the Design Recipe puzzles. I have doe all the puzzles through the original CS in Algebra A & B. I am redoing them in the newer version. But because I have done the puzzles my answers come up on the screen when I go to them. If I try using a students account, it is view only and I can not show students where to find the blocks necessary and place them in the evaluation blocks.
Any suggestions?