Teepee Tent

I still keep thinking about those teepee tent things for kids we saw in Seattle.  I really think Connor needs one.  He loves being under things.  I found one online for $150 but I think that is way too much.  So maybe, just maybe I am thinking about making one for him for xmas.  It can't be that hard.  Four panels and the seam thingies to hold the wood slats.  Have to check out the fabric store and then check with Betty to see if she can help me.  I know my machine will not sew good thick material.  I'm sure I can do it for a lot less than $150.