Marilyn Scott-Waters is a designer and illustrator. She’s put up a very fun site called The Toymaker. Here you will find a variety of folding paper toys to make yourself or for adults and children to make together.
The projects are colorful. Marilyn’s illustrations are a delight. There are paper toys, wee books, holiday cards, boxes, baskets and bags, origami, and many other transient delights. There’s even a Habitat for Humanity house to make and decorate.
This is one of the best free things I’ve come across in awhile.
Marilyn also has a book for sale on Amazon: "The Toymaker: Paper Toys That You Can Make Yourself." She’s also illustrated "Search For Vile Things: Volume One" and did the paper engineering for "Fruit " (Pop and Sniff.)