Warm glass is like a magical process where you can take pieces of glass and make them get all cozy together. It's kinda like making a really yummy sandwich - you take two slices of bread and add stuff in the middle, right? Well, with warm glass, you take two pieces of glass and put them in a special oven called a kiln. The kiln gets hot and melts the glass just a little bit so it sticks together like glue.
When the glass cools down, you can take it out and your two pieces of glass will be stuck together forever! But that's not all, you can also make the glass do all sorts of fun things, like make it wavy or bumpy or even a different color!
It's important to be careful though because the kiln gets really hot and you don't want to touch it or get too close to it. But with a grown-up's help, making warm glass can be a super fun and creative activity!