The secret behind Illusions Thinking Putty is its thin-film interference: which is caused by light waves that are reflected and refracted by a veiled or structurally complex coating. Often called iridescence: this causes the putty to shift colors right before your eyes. The ancient Egyptians were amazed by the scarab beetle. Its beautiful: color-shifting exoskeleton which mirrors light in tones of purple: blue: red: and copper appeared magical and beyond the powers of man. Often used in Egyptian art and religion: the scarab symbolized the restoration of life and was used for amulets: talismans: and jewelry. Super Scarab Thinking Putty is a modern interpretation of this colorful icon that's sure to leave you as spellbound as its namesake. Each tin includes 1/5 lb of Super Scarab Thinking Putty huge handful for tons of fun.