Another way to knit a cube in entrelac.

1. Knit the 1st square. End on a wrong-side row. Do not break yarn.
2. Cast on (or knit onto scrap yarn stitches cast onto the left needle) and knit the 2nd square. Attach the left side of the 2nd square to the top of the 1st square as you go. End on a right-side row.
3. Pick up stitches on the left side of the 1st square (from the top down) and knit the 3rd square, attaching the right side to the top of the 2nd square as you go. End on a right-side row.
4. Pick up stitches on the left side of the 3rd square (from the top down) and knit the 4th square, attaching the left side to the bottom of the 1st square as you go. End on a right-side row.
5. Pick up stitches on the right side of the 1st square (from the bottom up) and knit the 5th square, attaching the left side to the bottom of the 2nd square and the right side to the top of the 4th square as you go. End on a right-side row.
6. Pick up stitches on the right side of the 2nd square (from the bottom up) and knit the 6th square, attaching the left side to the top of the 3rd square and the right side to the top of the 5th square as you go. End on a wrong side row, leave a long tail of yarn. Stuff the cube if you like. Graft the top of the 6th square to the right side of the 4th square.

Oops, it looks like I left something off the diagram. I'll have to rework it. The 5th square should have a "ghost" copy of the 2nd square attached to its left side.