Yonga

A slow and steady large growth during a yoga session

Extras | [gif version] [2] • Source: Yonia

Typically the bigger they start with, the bigger you can go without it getting too distorted. That means the end result here could go pretty big.

Sunlight

Trying out the puppet tool for bounces:

Extras | [gif version] [2] • Source: Kanzume Shoujo

Not really a fan of how it turned out, but using the puppet tool is faster than using paths. I don't have experience picking the right spots with the tool.
One thing I did that doesn't really show up, but always bothered me when doing drawn things is the line art. I removed the line art around the chest, then put it back in after the animation that way the line art doesn't increase as her chest does.