Kitchen knives for 'little cooks'

[chilledmama]

Evening all...
I'm looking for some advice...My DS (almost 7) has finally taken a liking for cooking. I'm really happy to encourage him in the kitchen but not happy to give him my kitchen knives. Equally, using a butter knife (or equivalent) is probably more dangerous because it's so blunt! So my question to all of you...What knives to do you let your 'little cooks' use??
TIA

we got one from the pampered chef that cuts carrots etc but is too blunt to cut fingers

I got DS a lettuce knife which he uses to help me with veg - the little pampered chef things are good (he uses them at nursery), but nothing beats the look of glee on his face as he gets handed a 10 inch long, bright green plastic knife (like mummies... although hers is metal) - I think that if he sawed hard he could hurt himself, but he's not managed it yet.

Oh, I didn't read - my DS is 3 - at 7 couldn't he just carefully use a real knife? I was definitely cooking dinners/puddings and using real knives at that age.