Northern Lights glows like no other, and is only available for a limited time at ASTRA member's shops like ours! Northern Lights has two personalities. Translucent, shimmering pearl-colored putty by day, and unique multi-color glow at night! The longer it's exposed to light, the longer and brighter it will glow at night. Use a regular or black light to brighten it, make a glowing mask, use it to read a book, the possibilities are endless! All Thinking Putty is completely non-toxic and made in the USA by exceptional individuals with disabilities.