Vtech InnoTab

My 4 yr. old son got a Vtech InnoTab for Christmas. He loves video games and gadgets, so we thought that he would LOVE the InnoTab. The graphics are amazing when you use the cartridge.  The built in stand is great as well.  My son has already lost the pen that it came with, so I wish Vtech would start selling extra pens for it, like how there are extra pens for the Nintendo DS.  The InnoTab does have some great features but the worst part about it is that it takes 4 AA batteries and it dies each day that he plays with it. So, we went out and bought 2 sets of rechargeable batteries. I wish it came with a charger like the Nintendo DS or iPad.