My 3yr old nephew is obsessed with dinosaurs, I also realise like most children sometimes their love of something dissipates quickly, so having a pattern-stripes-on the reverse was a part of my criteria.  My advice is to take it out and wash it before giving it to child as they often want it on their bed immediately!  I did this, and also with my older nephews Star Wars on.  
Lovely bright colours, and my nephew wanted to know the name of all the dinosaurs lol!