Are you making Kappa out of polar fleece?  I'd say 1/2 yard of the main green fabric if it's 60" width and 1 yard for 45" width (assuming legs), 1 foot of foam (you could get away with 6 inchess), 12-16 inches of green shell material, 8 inches of skullcap green, 8 inches of beak colour fleece.  That's my educated guess based on measuring my pattern pieces.

Your experience making plushies will serve you well with puppet making.  I'll work on drafting those legs.

Yea, either Polar fleece or blizzard fleece...whichever happens to be on sale at Jo-Anns. What kind of foam should I get? I know from reading that reticulated foam is used most puppets. Right now I don't have the money to buy it. So what is a cheaper alternative that works well?

You could use the poly foam from Joanne's also.  But this site has reticulated foam for a lot less than others:
http://foamandfoam.com/out_door_foam.htm
$27 plus sh & handling for 54"x72" of the 1/2".
If you still don't want to spend that, I would just go with Joanne's and poly foam. 
Good luck!

Welcome to the board.. If cost is an issue joanne's has sales all the time on fleece and foam.  Since you're new to this you want to start out with cheap materials.  As you get more comfortable then upgrade as needed.  Oh btw Joannes always has fleece on sale.  Foam on the other hande seems to be every few months.  So when they do have it on sale you should get as much as you financially can handle.  I would say when it comes to first timers you want about a yard of the fleece you're looking for.  Some would say this can be to much but it leaves room for mistakes.  Oh one thing I forgot to mention.  I'm with Jon that design is great for a first time puppet.   It's a simple round head.  If you research you'll find ways to create a perfect circular head.

Your local fabric store should have poly foam and since you don't need a lot it will be cheaper that way.  1/2" is used in the pattern.

Here's a leg pattern I just whipped up in polar fleece.  The leg portion is a rectangle 3.5" wide by 7" long.  The foot pattern below is placed against a 1/4 inch grid, so you can use 1/4 graph paper to copy it.  (You can down load 1/4 graph paper for free at http://graphpaper.us/ choosing 4 squares per inch.)  Cut two of these oval shapes for the top of the foot as you see it pictured.  Cut two oval shapes without the center hole for the foot bottoms.  I used 1/4" seam allowance on the leg length and foot perimeter trimming down to almost 1/8 after sewing.  The leg tube is hand sewn to the foot using a whipstitch or ladder stitch.  This sample leg looks a bit long compared to your sketch so you may have to reduce that 7 inch leg length.

Yea, a moving mouth and rods for arms. Just a basic puppet. I am sorry I didnt state that in my post, I am kinda new at this whole thing.

No worries - sometimes clarification can help 
I agree with the others, a project puppet pattern would suit what you need

I was also wondering about how big the puppet will end up being?

Thank you Pam for making the leg pattern for me.

The puppet would be about 16 inches from the top of the head to the body bottom.  Another 7 inches for the legs if left unshortened.  If this is too small for you, and the pattern IS pretty small if you have a large hand, I'd take it to the office supply store and increase it.  Ask for 115% on the copier and it will be a larger size.  The Rotundo pattern is a larger pattern with the same round head shape, but it is more expensive and a little harder to construct.  For your first puppet the simple series would be better, even if a bit small because it is easier to construct and cheaper even with the photo copy fee which will likely cost you less than $2. Once you've tried a simple series pattern and you fall in love with puppet building, than you may be more open to dropping the cash for a Forma Series pattern.  Punto is my favorite shape pattern.  Anything in the Forma series is a larger, more robust puppet with a more professional feel to it.  The simple series is smaller and therefore lighter and easy to use.  I am more likely to "play" with my simple series puppets because they are lighter. The kids like them too.  Forma is better for stage performance use because of their size.

Oh, you're welcome!  Making the leg was fun.

I have a simple series pattern and I increased it by 115%.  It made it more comfortable for my hand.  I love that size.  My husband who has a large hand still cannot fit it inside the puppet.  I also increased the pattern to 129% (original to 11x17) and I think that will work well for a large man hand sized puppet.  I am finishing off my 115% puppet this week so I will try to take a photo side by side so you can see the difference.

That is good to know PuppetBubba. I'd like to see it myself.  I'm working on one at 115% right now and also wondered about the man's hand fitting.

The size of any of my hand puppets is limited by the size of my hand.  If its too small for my hand to fit in then its too small.  Experiment with paper to find out how big you need to make the head of your puppet.  The rest of the puppet will be made so that it will be in proportion to the head.

If you want a very round, sphere like head, start with a sphere.  There are several patterns out there to make paper spheres.  The patterns work even better if you use them to make a sphere with foam.  Make a ball and put a beak on it.

In regards to fabric, I would suggest you stick to antipill fleece.  It has better stretch and seam hiding capabilities than either blizzard and alpine fleece.  It is often on sale at Joann's for 40% to 50% off.  Tipically I get 3/4 to 1 yard of fleece for every puppet.  there has always been some left over bu I think thats better than running out.  besides I keep the excess and use it for details on other puppets.  In the long run nothing has gone to waste.