How do you make snuggle sacks?

[The3Cavies]

how do you make guinea pig snuggle sacks? I dont no how, all the ones I make look like bags and my guinea pigs won't go in them.
I might need pictures because i'm not verry good with just words ")

 

[piggie-power]

Is this what you mean honey?

http://imageevent.com/bizylizy/craftsguineapigfun/sewingprojects/lilygraceshowtomakeacozy