Here are two activities to practice or reinforce using dichotomous keys for identification using Ugly Dolls based on the same line of plush toys. Activities 1 and 2 are intended to be used by students in a one-to-one environment.
Activities 1 and 2 ask students to identify the character and "drag-and-drop" the character image next to its actual name. These activities use different characters so they can be used to assign different versions to different classes or students. Also, the second version can be used for reteaching.
Activity 3 is more complex as it asks students to create their own key using the ugly dolls. This may be a good extra credit assignment for your course.