I got the idea of drawing with my non-drawing hand from a deviantArt friend and thought I must shared it here. You should try, you could surprise yourself pleasantly, like i did.
I still can't belive I made this with my left-hand:

Click to view attachment

wow, that's terrific Mr. Ofir, I can't even sign my name properly with my left hand.

that is pretty great for using the left..myself like kaly cant even write my name properly with mine..

When I come to a part of a drawing that is very intricate I sometimes swap over to my right hand which forces me to slow down and concentrate even more

Hi, thanks for bringing up the topic it is very interesting.

Without a doubt it takes a bit more concentration if you are not doing this regularly. I don't have much difficulty drawing with my left or weak hand. As Lance says it slows things down a bit because I'm not doing this everyday the way I am with my right hand.

So why is this? It's not because I'm all that ambidextrous I assure you. It is because of the way I hold my pencil. If I were to write with my left hand that would be a disaster. Watch a left handed person write and you will see what I mean. Because I hold my pencil near the top and change the angle depending on the line I may be drawing allows me to use either hand. It is kind of a mirror image. In my case the position of my hand, the use of the side of the palm and the little finger to stabilize the movement do not change.

So in short it all comes down to the fact that drawing is not writing. So if you can't write with your weak hand maybe you can draw with it.

I drew a frog with my left hand (53 sec) and with my right (7 sec)

Conclusion:
My left hand/wrist is aching a little.

Thats nice comparing looks like the frog done with left hand is even more sad I can`t use my right hand perfectly so trying with left hand would be very demotivating but nice work Mr.Ofir..

Yes the comparing is a good idea. Here are two sketches of a chess piece. The big difference between my strong hand (right) and my weak hand is that the weak hand took me almost 3 times as long. ~15 minutes versus ~45 minutes. Can you tell which one is which?

I could never imagine being as productive with my weak hand but I think I could get pretty close with a lot of practice. . The nice thing about this is that if I have a mishap with my right hand I can still draw with my left hand.

Click to view attachment

I started out as left handed, but my first teacher couldn't get me to write forwards. I had my left hand tied behind my back and it worked. With my right hand I could write letters forwards, so I've always written righthanded and, I guess because of strengthening of pen and pencil muscles, drawn and painted mainly right-handed. I'm still left footed and I am a lefthand bat in cricket (but a right hand bowler) and I do draw some lefthanded drawings which seem different from my right hand. To me it's like a different person, but I guess that to everyone else it looks just the same.

Doesn't swapping hands when writing stuff up things in later life? Or is that only when it's a permanent swap?

That's OK. I can't even sign my name properly with my right hand and I'm right handed.

I'm taking a guess here.. the right piece was drawn with your left hand because the shading is lighter.

Yes that is correct the right piece is drawn with my left hand.

So - I tried the left hand/right hand drawing (I am mostly right handed). I spent approximately the same amount of time on both of my drawings so I could see the difference between the two. I think the left was "not bad" but it is obvious which is my better hand.
Of course, the more you practiced the better you would get.

Click to view attachmentClick to view attachment

I am left-handed and have always loved seeing the difference between dominant and non-dominant hands. I tried this pencil and as I was trying it with my right hand I realized that choosing something with such a straight line in it was not such a good choice! That straight line was quite a challenge! Anyway, I don't think my right handed drawing was so bad.

Click to view attachment

Everyone's done a great work with your weak hand here, that should encourage those who haven't try it to do it. Listen to RJ, drawing isn't writing; You should see my handwriting you wouldn't understand a thing and probably even be disgusted by it
I did the comparing thing here with Tristan Tzara portrait:

Click to view attachment Click to view attachment

Interesting thoughts. I'll have to give it a whirl sometime. I wouldn't make a habit of it though. I think forcing yourself to draw with your opposite hand could mess you up in the long run. I dunno. If I do it I'll be sure to slap it up here.

I think that drawing with your non-dominant hand is great eye-hand coordination and fine motor practice. Being left-handed, you notice how much is catered towards righties. I have learned to do a lot with my right hand and I think it can be very useful to be somewhat ambidextrous.