It wasn't until he read The Marzipan Piglet by Russel Hoban that he knew he wanted to do something similar.
So, in 1990 he turned to writing children's books; his first book, Een ober van niks [Dutch]translated to "A Waiter from Nothing", was published in 1992.
[2][3] In 2009 he was awarded a Silver Griffel for Tiffany Dop, and in 2010 he was asked to produce the 2011 Kinderboekenweekgeschenk.
[4] In 2012, he translated Dav Pilkey's Captain Underpants series into Dutch.
[5] In 2024, the book De jongen die van de wereld hield (The Boy Who Loved the World) that Veldkamp created in collaboration with illustrator Mark Janssen was awarded the Woutertje Pieterse Prijs.