These books are wonderful for the early elementary grades.
from the cover of Games for Math:
"These witty, imaginative and entertaining math games offer a welcome improvement over the counting drills and fill-in-the-blank workbooks that have bored children for generations. When children play a clapping game to learn about counting or a dice game to learn about multiplication, and bake brownies to learn about metrics, chances are good they'll develop mathophilia rather than mathophobia."
"The games are easy to follow and easy to play; A busy working parent can read a game in a few minutes and start to play right away--anytime and anywhere. Most require no materials at all, or only the simplest things--pennies and paperclips, cards, dice. And the games are helpful for all young children, whether they are having problems or not."
(The same holds true for the reading book. The games are simple, and require no preparation.)
The only problem with these games is taking the time to play them, but I think they are just as helpful, if not more so, than workbook pages. It's been awhile since I've needed to play them, since my children are teens now, but we did enjoy these books.