These adorable dino buddies are both worked with the same basic amigurumi pattern, then their extra details (horns and the like) are added on afterwards.

The dinosaurs are both worked using the amigurumi method of crochet, which involves working the stitches continuously in a spiral without closing off each round with a slip stitch.
You may find it useful to use a stitch marker in the very first stitch of each round, moving it up as you work.