Math for Preschooler

I have been researching math programs for my preschooler and have finally decided on RightStart Mathematics. I love how it works with many different types of learners since I have no idea at this point how my children learn, and want a program that will hopefully work for all three. I also like that it can be started before children are able to write well since I hope to start the concepts used in it soon.

Blue is starting to be interested in counting and numbers and I would like to help him by using the concepts used in RightStart, from their website "the beginning level math lessons are best started at age 5, or even sooner, before the child develops a reliance on counting strategies. An early start also helps the child understand quantities based around 5s and 10s."So even though I probably won't start doing the lessons yet I would like to personally review it so I can help Blue use their counting process.

Growing up I did not particularly like math but during college I learned to love it! Had I not been worried about my GPA I would have continued Calculus and who knows where I would have stopped :-) I really want my children to enjoy mathematics and be able to go as far with it as they would like.

Has anyone used RightStart with a 3 1/2 year old? Did you actually do the lessons or just the games and the counting process used in the curriculum?