With my 4 yr old grandson, I wrote out his name in large bubble letters, and he was happy for an hour. Every time he finished tangling inside his name - it was, "Nana, my name again, please!" (I insisted on that last word!)
Of course, I don't start with Rick's Paradox with 4 yr olds, but they can do lots of other designs. And just like us older tanglers, they become progressively better and proud of their creations.
Lura Mathews, CZT4, Pen + Paper = Happiness