in need of LED suggestions

[Dragonrider1227]

I have this idea of cosplaying the 2009 movie version of Astro Boy and want to create the glowing "blue core" effect like this;
http://caps.pictures/200/9-astro-boy/fu ... m-5862.jpg
http://caps.pictures/200/9-astro-boy/fu ... m-5876.jpg
Naturally, I want to use LEDs but looking for advice on how to go by it.
My immediate thought is to use something like this;
https://www.amazon.com/dp/B01K711UIW/_e ... 1SA5C9H6JQ
wrap blue cellophane around it and attach it under my shirt but I thought I'd ask people with more experience in LED effects for cosplay. What do you all suggest?

[NoDoubtNoHarm]

I have not personally used LEDs in a cosplay, but I am familiar with them. I would say that cellophane is not a great option because it will interfere with the light being emitted. I'd recommend that you look for an LED that emits blue light instead. I could potentially suggest more specifics, but before doing that, I'd want to know how handy you are with tools and electronics. But in case you're not comfortable sharing that, here's a product that functions similarly to what you found on Amazon but produces blue light.