The puzzle itself is not 21-foot-long. There are 51 puzzles altogether on the fold-out pages. And yes, the answers are all there at the back so you can check if you worked out the clues right or not. It comes in a slip-case.
With more than 50 crosswords, all of which are just for kids, this 21-foot long puzzle book will provide hours of entertainment, with clues that perfectly fit a child's knowledge and interests. Plus, as solvers fill in the grids, they'll also be improving their vocabulary, spelling and logic skills. The many short answers help minimize frustration...and keep the puzzles fun.