First we noticed: the puzzle smells very unpleasant to glue etc. Next shortcoming: the Z went out only with the help of Mama's fingernails and vigorous drawing, and did not improve even after repeated removal and insertion unfortunately. My daughter alone it would not be able to take out all the puzzle pieces. Another drawback: some symmetrical-looking letters such as H, the Z or S fit only "in one direction". Viewed with the naked eye it looks as if it did not matter where, for example when H is up and down. In this puzzle but this is unfortunately not the case. I think that's not good for small children because they find the right space for the proud H, try to use, but it does not work, even though they actually have done everything right. Perhaps we had caught a Monday-copy? In any case, the puzzle of the above reasons was unfortunately back.