Radical 一
7 strokes
兩
one 一 (1) + from 从 (103) + outer limits 冂 (160a) = couple 两
二 (Character 2) is used in writing numbers, in isolation or in a telephone number for example. But 两 is used with measure words, when talking about “two of ” something.
[两个人 (19, 12) liǎng ge rén two people]
[两棵树 (188, 155) liǎng kē shù two trees]

The zoo gets a unicorn from the outer limits, to obtain a couple of unicorns which they hope might breed (where have we heard this before?!) / The two teddies are set the task of watching the unicorns’ body language, to see if they are getting on!