Please review my website
kalendae: first of all the idea is great, and when my son is older I will definitely use this.  What would be really nice is some sort of guidance system by age.  For instance, which worksheets are appropriate for which age, maybe as a wide range.  and the parameters within the worksheets could use a recommendation as well.  This is because as a first time parent it is hard to tell as i've already gotten the feeling that presenting toys of wrong difficulty sometimes really results in reduced intended effect.