This was actually a lot harder than I thought it would be. Wally is called different names in different countries and there is not that much free stuff out there, but I managed to make them a small book each.
You can find out about Wally on Wikipedia. There is a site for Where’s Waldo here. And another one here. They contain some online stuff as well as printables like crosswords. A UK Find Wally website.
This Where’s Wally website sells all the books. And this is the link to the Where’s Wally Facebook page.
Here are some of the pages I included in the boys books. They have just started them and think they are great.