My husband the math teacher is really into teaching my 2 year old all sorts of stuff about math and science. Just this morning I overheard him say to her, "Let's watch the Wonderful World of Chemistry!" I just have to laugh sometimes. Now he is really into trying to teach her shapes. We don't have a pyramid, so he asked me to make him one. Here it is. It's just 4 triangles sewn together with a bit of stuffing in it. My stitches holding the thing together need work . . . . But it does the job!
Row 1: Ch. 20, sc in 2nd ch from hook, sc across, sc2tog in last two stitches. 18 sc.
Row 2: sk first st, sc across, sc2tog in final st and turning ch of previous row.17 sc.
Repeat row 2. Your final row will just be sc2tog with one stitch and the previous row’s turning ch.
Make four, stitch together, and lightly stuff to get your pyramid.
Another pretty cool single piece pyramid pattern can be found here.