Why are these crosswords so wonderful? Just look at these clues and see: Castle site? (Solution: SANDBOX.) Trip around the world? (ORBIT.) It’ll give you that sinking feeling. (QUICKSAND.) It’s clear that while the questions are clever, the answers use plain language, and not that mysterious vocabulary found only in the puzzle world. Adding to the fun are the crosswords’ themes, which provide a guide to some of the answers. Once they sharpen their pencils, and their minds, solvers will have a great time honing their skills on every one.