The American Boy’s Handy Book or What to Do and How to Do It by Daniel Carter Beard contains ideas that will keep your young man busy all summer.
The summer section includes knots, fishing, boats, soap bubbles, camping, and birding; but feel free to borrow ideas from all of the sections of the book. Written in 1888, this “manual of pastimes” is a perfect fit for summer.
The American Boy’s Handy Book is in the public domain.
Free eBook
Additional Resources (by the same author)
The Outdoor Handy Book
Also full of summer activities.
Boy Scouts Handbook {Free eBook}
The original Boy Scouts Handbook published in 1911 by the Boy Scouts of America.
DIY Homeschooler 