You will find that this activity book has a good balance of easy and hard puzzles.
Rabbit’s Pajama Party (MathStart 1) – Paperback By Murphy, Stuart J. – GOOD
A nice touch is the stickers that mark your progress in this activity book.
MathStart 1 Ser.: Rabbit’s Pajama Party by Stuart J. Murphy (1999, Hardcover)
A nice touch in this novel is the way it handles time jumps.
