I bought an OiOi bag for $140 I think and I loved it! I used it for the first 10 montsh and now its in the cupboard as I just bought a gorgeous bobbleart childrens backpack for DD. I use that to take out now as her bag. DP doesnt mind carrying it and he didnt mind carrying th OiOi bag. Its totally up to you but just letting you know there is the bak pack option too. You could get a cute Thomas one or a dinosaur one and people will know its DS's bag