ROYAL LANGNICKEL-Engraving Art. Engraving art is a great way to get the kids started with out the mess. A variety of these kits are available and there is sure to be one perfect for rainy days, camps, fun day at school and much more. This package contains Design Your Own Rainbow Keychain Kit: four 1-1/2×1-1/2in die cut squares, two 2-part acrylic keychains and an engraving tool. Available in a variety of themes: each sold separately. Recommended for children ages 8 and up. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.