I purchased Jump Start Preschool and Kinderkarten along with Dora the Explorer: Lost and Found Adventure. I loaded both programs, each on a seperate computer in my home office, and allowed my 7 year old and 3 year old to have unlimited access to both programs. The kids played with both programs, sometimes sharing and sometimes one each. After a half hour, the winner became clear. Dora was abandoned for the Jump Start program. Both the kids are sitting around the same computer sharing the Preschool and Kindergarten program. The 7 year old is showing the 3 year old how to handle the environment and they've been glued to it for over three hours now. I asked my 7 year old what's wrong with Dora and she said bluntly, "it's boring." She then screamed "I got a pet!" and turned back to Jump Start. The three year old is obviously following the 7 year old so I checked out Dora myself and quickly realised it's over-complicated and, yes, boring.
P.S. I signed up with the monthly $8 for the online expansion for Jump Start. Good work to the people at Jump Start!