LEGO Harry Potter Hogwarts: Herbology Plants 76474. Build artificial plant models including a Mandrake, Fanged Geranium and Mimbulus Mimbletonia. Remove the Mandrake from its pot so its roots shake and mouth moves, turn the wheels to make the Fanged Geraniums 'bite' and make the Mimbulus Mimbletonia pulse. Two plants can be placed on the table with a vine and earmuffs. The Mimbulus Mimbletonia measures approximately 24 cm high, 11 cm wide and 9 cm deep.