The ink washes off fingers and most clothing with warm, soapy water. The quick-drying, fade-resistant ink is also acid-free for archival quality. The pink, purple, turquoise and green ink in this stamp pad presents crisp, vivid images when stamped. Stamping is a fun way to develop fine motor skills and foster creative expression. The ink pads are packaged in a plastic case with a flip cover to prevent them from drying out. For ages 3+. 4 colors in each box. Each pad 3" x 1 1/2". Non toxic. 3 1/4" x 6 1/4". Available in Primary colors (Red, Yellow, Blue, Green) or Electric colors (Hot Pink, Purple, Turquoise, Lime Green).