I took the crib mattress pad out and just measured around it to get my dimensions right. I ended up with a piece of material 33" x 43".
Next I cut out a notch 3"x3" on each corner
With right sides together I sewed each corner
(makes a pouch to fit over the mattress pad, think fitted sheet)
Bought a packet of elastic at WalMart
Stitching the elastic to the edge of the sheet...pull on the elastic and sew,
the fabric should bunch behind the pressure foot as you go.
Here's the completed fitted sheet
before putting on the mattress pad
And everything in place in Kipp's room
Now we just need Kale to get here :)