Zentangle No. 2 builds on Static (wavy one), Tipple (circles), and Crescent Moon (the half moons) by adding Fescu (the plant-like one), Knights Bridge (checkerboard) and Nekton (hashmarks.)
Zentangle No. 3 includes Knights Bridge (checkboard), Festune (the blood-cell looking thing), Hollibaugh (the boards and darkness one), and Poke Root (the plant looking ones.)
I really enjoyed how shading Hollibaugh made the boards look layered.