These little buddies are made entirely of standard 1x2 Lego bricks. If you make a lot you could stack them or link them together.

Also See:
https://www.instructables.com/id/Lego-Circle/
https://www.instructables.com/id/Lego-Pentagon/

Step 1: Parts

You will need:
-63 1x2 bricks

For 3 color: 21 of each color
For 2 color; 42 of one color, 21 of the other color

Step 2:

Attach 3 bricks as shown. Repeat this 20 more times for a total of 21 stacks.

Step 3:

Turn the top brick, as shown, on 3 of the sets of stacks.

Step 4:

Start attaching the stacks as shown. Continue adding stacks until there are 7 bricks in the top row.

Step 5:

Add another one of the stacks that has the top brick turned. After adding 6 more stacks attach another stack with a turned piece. Finally, attach the rest of the stacks as normal.

Step 6:

Bring the two ends together to form a triangle. It will be a tight fit but it will snap together with a little pressure. Now experiment with different color designs and sizes.

Be sure to follow so you don't miss out on some really cool upcoming shapes.

Want more 1x2 LEGO fun? Check out these other 1x2 bendy shape Instructables:
Lego Star
L ego Saw Blade
L ego Cog
L ego Deltoid and Astroid
L ego Pentagon
L ego Circle
L ego Starburst
L ego Medical Sign
L ego Heart