Radioactive Spider Slime

2 min read September 13, 2026 Tiffany Hewlett
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For our superhero playdate we wanted to incorporate slime because I have a house of boys, and they LOVE slime! I knew adding a glow in the dark spider would be just the right touch to make the slime even that much cooler! I was right. The boys thought this was the absolute coolest and surprisingly enough the girls may have liked it even more!

Project Time
10 to 20 min
Difficulty
Beginner
Step
1

Pour both bottles of glue into a mixing bowl. Fill the empty glue bottles about half way with water, shake and then pour into bowl. Add neon green food coloring (I added about 4 drops). Stir. Mix Borax into hot water and stir until dissolved.

Radioactive Spider Slime step 1
Step
2

Add Borax mixture to glue mixture. Knead with hands until you get the slime consistency you want. Separate slime into the round containers. The slime will spread out to take the shape of the container.

Radioactive Spider Slime step 2
Step
3

I made these super simple radioactive spider labels. Just print them and cut them out. There are 12 on a page, and the slime recipe makes enough for 12 containers with a little left over.

Radioactive Spider Slime step 3
Step
4

To apply the labels I just used an Elmer’s® glue stick. No need to go buy fancy sticker paper!

Radioactive Spider Slime step 4
Step
5

Just a word of warning, don’t let the kids get the slime on the carpet or on their clothes. All the hard surfaces were perfectly safe. My niece got some on her dress, and while it was a little tricky to get off, it washed up nicely in the washer, so don’t fret too much!

Step
6

Make sure to check out the Radioactive Root Beer Floats and the rest of our Superhero Playdate!

Radioactive Spider Slime step 6

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