22 years of parenting/homeschooling seven children, and these are a proven STAPLE for us. The colors are rich. The marker quality is top of the line. And THESE LAST FOR YEARS AND YEARS. My daughter, who is now 17, got her set when she was 9. Her set still works and she has used it A LOT for homeschooling, coloring, and art (she is an artist, so heavy use). Her younger brothers (ages 7, 8, and 11) started borrowing her set so much, she bought them each their own set for Christmas.  And I became sold on these with my first child, who is now 22. He got his first set when he was about 8, and they lasted for a good 10 years. Who knows. He most likely still has them. These are perfect for adult coloring books. Fun for writing notecards. Great for journaling. Amazing for marker sketching. One of my favorite art products of all time.