As usual, click any photo to bring up a larger version.
This bike rack served us for a few years, but I produced a new and
improved version in 2012, which I think is more versatile, and works
better with adult-sized bikes. (Still works with kids bikes too!)
I strongly recommend that you read
that article as well: 2012: Quick and Simple
(And updated again in 2016 with an assembly video and more details: 2016: Basic Bike Rack)
This isn't exactly fine furniture. But it is still very useful.
Anyone with a few kids will likely have a few bikes, maybe a few scooters, and probably several other wheeled objects in the garage. A rack for the bikes will help bring order to the chaos.
NOTE: You're on your own, as far as getting your kids to actually use the bike rack.
The photo and diagram are probably all that you need to build your own rack. But here are some notes and dimensions as to what I learned for making my own rack.
ANOTHER NOTE: this works for smaller kids bikes, but you'll want to adjust the sizes for bigger kids bikes. I tried putting a bike with 26" wheels into this rack, and it didn't fit. I'd estimate that you'd need another 2" in the front-to-back dimension.
Remember: Check out the new and improved 2012 version: Quick and Simple Bike Rack