Crytal kits are notoriously iffy - sometimes they work, and sometimes they don't - and even the same kit will work sometimes, and not others.
It has to be perfect, and I mean really perfect, for them to work at all.For us, we ended up with crystals on only the base of the unicorn's tail and mane, and not on the tips (go figure). Those crystals are white or clear, and they look exactly like what they are - white crystals on a colored unicorn - not pink and blue crystals as the image on the box iSee full review