I used this tutorial here which is very straight forward and easy to follow especially for someone like me who finds it hard making heads or tails of most tutorials even when they're labeled as 'easy'.
I'm very happy with how it turned out and now Riley wants me to make him one to keep some of his cars in.
Not sure what I'm going to put in this one yet but I'm thinking of filling it with first aid supplies that might be useful to have on me when we're out and about.
EDIT: It turns out that its the perfect size for a travel makeup case. So I guess I'll just have to make another one for my mini first aid kit.