Hippopotics amiguruchi crochet - a description of knitting in Chinese, but it is possible to figure out the schemes: the list of rows and the number of loops is indicated.
Hippopotics amigurum hook
Description of the knitting of a large hippoplate from gray yarn and medium hemmedis from purple and yellow yarn.
Description of knitting small hippos - from pink and green yarn.
Article on the topic: False Spit: Description of the schemes of various patterns with video