However, one of the many bonuses to continued sewing is you keep growing a fabric stash and currently I had enough fabric in my stash due to our JoAnn's moving store fronts this fall and clearancing all their fabric before hand to make the bag. I also had seen an ad for bean bag filler at Bed Bath and Beyond and got the filler for even cheaper than the ad said, so I filled it for only $11! (I made the larger bag)
There are lots of bloggers who've already sewn this, so I had lots of reading info before hand. Everyone seemed to really like the pattern and their kids have loved them. Mine are no exception while I made this for Peyton, Carter will get in it every chance he gets! :) He will probably be getting his own soon.
My only tip is to follow Dana's advice and use foam for the filler. Since I got the bean bag pellets for so cheap I went that route but they have compressed quite a bit in just a couple weeks so I'll definitely use foam in Carter's. It really was a pretty easy sew, I had some trouble getting the insert in the cover but I persevered If you have kids this makes a great project!