The origami sloth by Anita Boubour is based on the frog based and takes a little longer to fold. A patiente Beginner can probably fold it, but I recommend a little folding experice in advance before trying this fold.
The origami frog is a traditional model that is very easy. In fact, it is the very first model I learned. So I can safely recommend it for beginners. It takes about five minutes to fold. Once you practiced a little how to fold this jumping frog you will be able to fold it much quicker.