johnnyHunts,
What do you want to spend? And are you going to buy a firearm for both kids?

Cuz if I had 2 kids and was thinking of spending around $275 per kid, i'd give this a look

http://www.rossiusa.com/products/matchedsets.cfm

I've seen them for $239.00 on sale

And check out these options also, though I don't know of any sales on these yet

http://www.rossiusa.com/products/gunselector-results.cfm?series=MMS&Category=MATCHEDSET