Press Space. If you get confused just click the flag then space. It will tell you what to do. Here is a Unicode data base (copy and paste) http://www.amp-what.com/unicode/search/ You can search for emojis, arrows, letters, symbols and simple pictures
All the friendly Scratchers that shared these with me. (I did find out a couple on my own) Adding soon: _cupcake_ and _camera_ and _=^..^=_ (When I feel like it)