You could use any yarn to make this hedgehog, but remember to adjust the hook size accordingly so that your stitches are nice and tight and the stuffing does not show through.

This pattern can be used to make both elephants, I used a cobweb merino with a .75mm hook to make the smaller elephant.

This pattern can be used to make both Hippos, yarn requirements about 25g of 4ply for the larger Hippo, small amount of contrast yarn.

This little mouse is about 3” tall when finished, using laceweight yarn and a 1mm hook.