(You can also hold together 1 strand of ww yarn and 1 strand of washable sock yarn for more warmth.)
2 stitch holders and yarn sewing needle.
Knitting needles sizes 5 and 7  (6 and 8 for larger sizes)
Gauge with size 8 needles: 5 sts = 1"  6 rows=1"

Both mittens can be knitted at the same time.  Simply use 2 skeins of the same yarn, or yarn from the middle and outside of the same skein.  Cast on 2 mittens on the same needle and work across using the yarn from one skein for one mitten and yarn from the other skein for the 2nd mitten.  Works great!

CUFF- (using smaller needles): Cast on 28 sts. Work in ribbing of k1, p1 for 10 (12) (14) rows.

HAND: (using larger needles)
Row 1: inc 1 st in each of first 2 sts,  k across, inc 1 st in each of last 2 sts - 32 sts. 
Row 2 and all EVEN rows: Purl
Row 3: Knit 
Row 5: K 15, place marker on needle, increase in each of the next 2 sts, place a marker on needle, k 15.
Row 7: K 15, slip marker, increase in next st (make your increase by knitting into base of  next stitch instead of into top of the next st.  Makes for a neater increase.), k2, increase in next st, slip marker, k 15.  Continue  to increase 1 st after first marker and before 2nd marker every k row until there are 12  (14 for both larger sizes) sts between markers.

(You are going to place some stitches on holders here, so you can work on the thumb)
Next row: (This is a purl row)
P16 (you will have to remove marker for the 16th stitch); slip those stitches to a stitch holder, p 10 (12 - for both larger sizes) (this will become the thumb); slip remaining 16 sts to another holder (removing the marker).

THUMB: Work even for 4 (6) (8) rows.  K 2 tog across next row.  Break yarn; leave end for sewing.  Run yarn through remaining sts, draw up tightly and fasten.  Sew thumb seam.

TOP: Join yarn at beg of 2nd holder, p to end of row purling right off the holders back onto needles.  Work even on 32 sts for 12 (14) (16) rows.   You can change colors on knit rows (right side of mitt)  if you wish to add stripes.

SHAPE/decrease TOP:
Row 1: (k 2 tog, k2) 8 times.  
Row 2: Purl  
Row 3: (k2 tog, k1) 8 times. 
Row 4: Purl. 
Row 5: K 2 tog across. Break yarn; run through remaining sts and fasten.
Make a 2nd mitten in the same manner. Sew up seams by whip stitching or use the MATTRESS STITCH so it's 'invisible'.

Fasten mittens together with a safety pin.

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"Every year our local TV station does a mitten drive for needy kids in the area.  I've been feeling like making some mittens lately and decided I'd make some for the mitten drive. WELL!  ... after muddling my way through two patterns for kids' mittens that made my head ache (left inc here, right inc there, purl dec the other place) and didn't even come out that well, I thought "geesh!  I just want to make some warm mittens for some kids.  These patterns are like making my family a ten-course gourmet meal when all they really want is a good meatloaf and some mashed potatoes!"  LOL ... and then I found your pattern for 2 needle kids mittens.  i've almost finished the first pair already!  Your pattern is a joy - simple and easy to follow.  The mittens are just nice, warm kids' mittens.  I'm thrilled!
Thank you so much for publishing it!"
Warm regards, Vicki Brooker

Copyright 2011 Beverly A. Qualheim - All Rights reserved. If you make this hat to sell, please make one for charity too. Thanks!
You may provide a direct link to this pattern, but may not copy it to your web site. Feel free to run off copies for your charity crafting groups.

MATERIALS:
You can adjust the pattern to fit whatever size head you want. 
Child sized 3-5, 6-8,  (9-11)
Size 10 (6 mm) (size 4 UK) knitting needles 
2 oz of bright colored Worsted Weight/10 ply UK -  yarn 
(Use 2 strands of yarn held together to make this extra cozy, this will make the hat a bit larger)

Cast on (54 sts) 62 sts (70)
Row 1- ribbing: K1, P1, K1 across line, ending with P1.
Row 2 - 6:  Repeat Row 1.
Row 7: Knit across
Row 8: Purl across
Repeat these 2 rows until hat is 7" (8 1/2") (9") from start, ending with a purl row.  (You can also make this whole hat in ribbing Knit 1, purl 1)

Start Decrease
1st decrease row- K2 together across the row.
Next row: Purl
Next row: K2 together across
Last row: Purl across.  Cut a 14" tail of yarn, thread a yarn needle with it.  Carefully pull the last row of knitting from the needle and thread the needle through every stitch.  Pull tightly then whip stitch the seam shut.

Add a Pom Pom to the top.