Your kids will be amazed at you when you work with them to build an amazing 8×10 shed to help them keep their bikes out of the elements. They will never sit on a wet seat in the morning again.
Building a shed to help a charity, this 8×10 shed plan and build got some expert help and materials from Home Depot. The builder learned how to build a shed.
There are more photos and plans for this and many more backyard shed designs on iCreatables at https://www.icreatables.com/sheds/shed-plans