Building a tree swing is a great outdoor project and it's something kids can share.
A cute little portable flower press for days when the sun shines and you feel like a bumble...
Hi! I think making your own notebooks can be fun for rainy days... –maybe replacing sewing needles by plastic ones, or children's awl. Here it goes! (if you like it, check the 3 different tutorials) http://merchesico.wordpress.com/2012/06/02/independent-bookbinding-2/
I wrote a post for Paper Culture last summer about building SWING SETS: http://www.paperculture.com/blog/2011/07/swing-into-summer/