My son is a 5 year old headed into kindergarten this fall. Most of this set was far too easy for him. There are two clock activities that were a good challenge for him, and one graph chart that was a new way of looking at counting. But the other eight activities are simple counting exercises and simple comparison activities, all of which were quite easy.

I am the mother of a preschooler and am always looking for fun things to do with her that are not super boring or plain nonsensical from an adult perspective. If it teaches her something bonus for that too. These games are great for that purpose. She is entertained for a good 20 minutes or more and I don't feel like pulling my hair out. She plays with them independently too. They are right at her level, though I would say that a kindergartner would like them too. For 1st grader probably too simple.