Kids Ride-On Suitcase
I can't even tell you the number of times this suitcase has turned what would have been a long and tortuous journey from car to plane, into a complete breeze.
The ride-on functionality of this suitcase for toddlers works great, and our son is so excited to ride it that he doesn't even need convincing. The suitcase itself is pretty small, so if we're going on a longer trip we let him pack it himself with toys and books.
The top of the suitcase comes off and is designed to flip over with a little sliding piece that extends to turn any airplane seat into a kind of kid's bed. There is a custom "mattress"/bumper that fits in the suitcase top to make it more comfortable, but we took that out and just use our own blankets/scarves if we use it for this purpose at all. We even dressed it up as a chariot for a Halloween costume one year!
The wheels have held up great so far to a few years of travel. Definitely worth the investment for the saved time and reduced travel stress. It comes in a few fun colors too :)