Great for developing number sense

I love this game, from the way that the numbers are built up, to the way that kids have to purchase (with pretend coins) access to a new level. The puzzles are such a fun way to play with the numbers, developing creative, individualized use of addition and subtraction. The tallest ladders do get a little unwieldy, but it's not a huge problem. I like the bombs in the ladders. It encourages precision, but doesn't give any sort of a FAIL response, just a OOPS, TRY AGAIN.