Please? This is important.

I would like to ask the literary bunches of you this question:

What is the difference between “wriggle” and “wiggle”?!

I checked the meanings on dictionary.com and just not quite sure they mean 2 very different actions, or 2 similar yet different meanings? Or the same, as in, they are interchangeable?? You must pardon me, although I have spoken English for more than half of my life, English is still not my first language and it’s usually not the language that’s used when I have dreams.

Thanks for your input!

Update:
A thank you to all of you! I needed to know because of writing descriptions on these products. It’s a difficult task! Especially when there’s hundreds upon hundreds.

These toys will WIGGLE (sway from side to side). Not wriggle. Yes?

They also make the coolest clacking sounds that babies / toddlers love.