5.5 I think a DS would have a longer useage. 3.5-4yo would be right for a leap pad

My DD got a leap pad and she still uses it at 6 but I think its a little young for her. Also the leap pad requires 4 AA batteries which only last about 2-3 hrs of use, we have invested in rechargable AA batteries as it was ridiculous the number of batteries we would go through. And of course each time they need charging/replacing you need to remove two covers and fiddle about