dsi or leapster explorer for my 6 year olds bday? she already has my old ds getting old and a leapster bit old for it

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hi any thoughts as to which one would be better

she has ds is my old one likes it alot

has leapster whih she is abit old for now

thinking dsi would last longer than leapster explorer
can get educational games like hello kitty and brain training etc

I got my ds a dsi, hes 6 and one of his favourite things about it is the camera function! He loves taking photos and changing them about!

I'd go for a dsi as well