I started Bedtime Math
http://bedtimemathproblem.org/ recently with my now 5 year old DD and we have had a lot of fun with it. I believe that it can be adapted to some extent for much younger children especially if you use manipulatives to do the sums (certainly at the "wee ones" level) and you can also adjust it by using smaller numbers if your child can only count objects up to 3 or 5 or whatever. My DD likes it as it introduces numbers in a fun way with topics that are relevant and exciting for her - we often go and look up whatever it is they are doing math problems on.
Digg
